261020432 has 20 divisors (see below), whose sum is σ = 518063196. Its totient is φ = 127326720.

The previous prime is 261020429. The next prime is 261020453. The reversal of 261020432 is 234020162.

It can be written as a sum of positive squares in 2 ways, for example, as 12138256 + 248882176 = 3484^2 + 15776^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198293 + ... + 199604.

Almost surely, 2^261020432 is an apocalyptic number.

It is an amenable number.

261020432 is a deficient number, since it is larger than the sum of its proper divisors (257042764).

261020432 is a wasteful number, since it uses less digits than its factorization.

261020432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397946 (or 397940 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 261020432 is about 16156.1267635532. The cubic root of 261020432 is about 639.0843285610.

Adding to 261020432 its reverse (234020162), we get a palindrome (495040594).

The spelling of 261020432 in words is "two hundred sixty-one million, twenty thousand, four hundred thirty-two".