NEW YORK — New York City’s candidates for mayor fanned out across the city Sunday, delivering closing messages at churches and rallies and urging supporters to cast their ballots on the last day of early voting before Election Day on Tuesday.

Assembly member Zohran Mamdani, the Democratic nominee and front-runner, and former Gov. Andrew Cuomo, who is running as an independent, started their days with appeals to Black voters on separate calls with a morning radio show. Just before noon, Curtis Sliwa, the Republican nominee, campaigned through Brighton Beach, his second stop of the day in Brooklyn.

“It’s so important to vote, even if you don’t vote for me,” Sliwa said.

All three candidates had packed schedules and were contending with masses of people running in another contest: the New York City Marathon. They briefly intersected Sunday afternoon, when Mamdani, who ran in the event in 2022 and 2024, cheered on runners during a campaign stop in Greenpoint in Brooklyn. Along the marathon route, some spectators held up signs that referenced the candidates and campaigns.

Also on Sunday, Mamdani accepted the endorsement of a Satmar Hasidic political leader in Williamsburg, while three other leaders from the same group said they would support Cuomo.

About 584,000 voters had submitted early ballots as of Saturday night, far more than were cast at the same point in the last mayoral race, in 2021. On Saturday alone, about 104,000 people voted, the most of any day since the polls opened.

Though voting behavior has shifted in recent years, the large turnout reflected New Yorkers’ heightened interest in the race, in which Mamdani emerged as the front-runner after his shocking win over Cuomo in the June Democratic primary. In recent weeks, Cuomo has sought to cast his opponent as a radical democratic socialist who is out of step with Democratic voters.

Cuomo delivered that same message Sunday. In interviews on WBLS-FM and later on Fox News, Cuomo said that Mamdani lacked the experience and skills to implement his campaign promises. On MSNBC, Mamdani said that Cuomo had turned his campaign into one of hate and division because “the only thing he has cared about — power — is slipping away from him.”

Later Sunday, both candidates addressed church congregations. Mamdani spoke at First Corinthian Baptist Church in Harlem, then joined about 100 campaign volunteers gathered nearby for a last-minute get-out-the-vote effort in the neighborhood. They joined a network of 6,700 Mamdani volunteers across the city who were aiming to knock on more than 200,000 doors Sunday, which would set a campaign record for most doors knocked in a day.

Cuomo went to two churches in the Bronx and met with a handful of voters at a cafe on Arthur Avenue.