261687112 has 16 divisors (see below), whose sum is σ = 490838400. Its totient is φ = 130796880.

The previous prime is 261687109. The next prime is 261687119. The reversal of 261687112 is 211786162.

It is not an unprimeable number, because it can be changed into a prime (261687119) by changing a digit.

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, 33937 + ... + 40927.

It is an arithmetic number, because the mean of its divisors is an integer number (30677400).

Almost surely, 2^261687112 is an apocalyptic number.

It is an amenable number.

261687112 is a deficient number, since it is larger than the sum of its proper divisors (229151288).

261687112 is a wasteful number, since it uses less digits than its factorization.

261687112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11676 (or 11672 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 261687112 is about 16176.7460263181. The cubic root of 261687112 is about 639.6279673727.

The spelling of 261687112 in words is "two hundred sixty-one million, six hundred eighty-seven thousand, one hundred twelve".