261435952 has 20 divisors (see below), whose sum is σ = 511757176. Its totient is φ = 129369600.

The previous prime is 261435947. The next prime is 261435961. The reversal of 261435952 is 259534162.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82674 + ... + 85777.

Almost surely, 2^261435952 is an apocalyptic number.

It is an amenable number.

261435952 is a deficient number, since it is larger than the sum of its proper divisors (250321224).

261435952 is a wasteful number, since it uses less digits than its factorization.

261435952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168556 (or 168550 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 261435952 is about 16168.9811676556. The cubic root of 261435952 is about 639.4232695029.

The spelling of 261435952 in words is "two hundred sixty-one million, four hundred thirty-five thousand, nine hundred fifty-two".