261542732 has 48 divisors (see below), whose sum is σ = 508425120. Its totient is φ = 116736000.

The previous prime is 261542713. The next prime is 261542747. The reversal of 261542732 is 237245162.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1017548 + ... + 1017804.

It is an arithmetic number, because the mean of its divisors is an integer number (10592190).

Almost surely, 2^261542732 is an apocalyptic number.

261542732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

261542732 is a deficient number, since it is larger than the sum of its proper divisors (246882388).

261542732 is a wasteful number, since it uses less digits than its factorization.

261542732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 600 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 261542732 is about 16172.2828320556. The cubic root of 261542732 is about 639.5103122663.

Adding to 261542732 its reverse (237245162), we get a palindrome (498787894).

The spelling of 261542732 in words is "two hundred sixty-one million, five hundred forty-two thousand, seven hundred thirty-two".