261136492 has 12 divisors (see below), whose sum is σ = 458371816. Its totient is φ = 130173120.

The previous prime is 261136481. The next prime is 261136523. The reversal of 261136492 is 294631162.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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, 97293 + ... + 99940.

Almost surely, 2^261136492 is an apocalyptic number.

It is an amenable number.

261136492 is a deficient number, since it is larger than the sum of its proper divisors (197235324).

261136492 is a wasteful number, since it uses less digits than its factorization.

261136492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197568 (or 197566 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 261136492 is about 16159.7181906121. The cubic root of 261136492 is about 639.1790352423.

It can be divided in two parts, 2611364 and 92, that added together give a square (2611456 = 1616²).

The spelling of 261136492 in words is "two hundred sixty-one million, one hundred thirty-six thousand, four hundred ninety-two".