261422056 has 48 divisors (see below), whose sum is σ = 603749700. Its totient is φ = 105444864.

The previous prime is 261422041. The next prime is 261422093. The reversal of 261422056 is 650224162.

It can be written as a sum of positive squares in 2 ways, for example, as 197964900 + 63457156 = 14070^2 + 7966^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12951 + ... + 26278.

Almost surely, 2^261422056 is an apocalyptic number.

It is an amenable number.

261422056 is an abundant number, since it is smaller than the sum of its proper divisors (342327644).

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

261422056 is a wasteful number, since it uses less digits than its factorization.

261422056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39266 (or 39255 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 261422056 is about 16168.5514502691. The cubic root of 261422056 is about 639.4119402995.

The spelling of 261422056 in words is "two hundred sixty-one million, four hundred twenty-two thousand, fifty-six".