261562122 has 40 divisors (see below), whose sum is σ = 587541636. Its totient is φ = 86971968.

The previous prime is 261562109. The next prime is 261562193. The reversal of 261562122 is 221265162.

261562122 is a `hidden beast` number, since 2 + 6 + 15 + 621 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 226171521 + 35390601 = 15039^2 + 5949^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 72268 + ... + 75800.

Almost surely, 2^261562122 is an apocalyptic number.

261562122 is an abundant number, since it is smaller than the sum of its proper divisors (325979514).

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

261562122 is a wasteful number, since it uses less digits than its factorization.

261562122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004 (or 3995 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 261562122 is about 16172.8823034115. The cubic root of 261562122 is about 639.5261156730.

The spelling of 261562122 in words is "two hundred sixty-one million, five hundred sixty-two thousand, one hundred twenty-two".