261210632 has 32 divisors (see below), whose sum is σ = 537969600. Its totient is φ = 118350144.

The previous prime is 261210623. The next prime is 261210637. The reversal of 261210632 is 236012162.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 261210598 and 261210607.

It is not an unprimeable number, because it can be changed into a prime (261210637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33863 + ... + 40854.

It is an arithmetic number, because the mean of its divisors is an integer number (16811550).

Almost surely, 2^261210632 is an apocalyptic number.

It is an amenable number.

261210632 is an abundant number, since it is smaller than the sum of its proper divisors (276758968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261210632 is a wasteful number, since it uses less digits than its factorization.

261210632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74765 (or 74761 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 261210632 is about 16162.0120034605. The cubic root of 261210632 is about 639.2395198944.

Adding to 261210632 its reverse (236012162), we get a palindrome (497222794).

The spelling of 261210632 in words is "two hundred sixty-one million, two hundred ten thousand, six hundred thirty-two".