561256260 has 48 divisors (see below), whose sum is σ = 1585953600. Its totient is φ = 148293504.

The previous prime is 561256249. The next prime is 561256261. The reversal of 561256260 is 62652165.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (561256261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36370 + ... + 49449.

It is an arithmetic number, because the mean of its divisors is an integer number (33040700).

Almost surely, 2^561256260 is an apocalyptic number.

It is an amenable number.

561256260 is an abundant number, since it is smaller than the sum of its proper divisors (1024697340).

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

561256260 is a wasteful number, since it uses less digits than its factorization.

561256260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85940 (or 85938 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 561256260 is about 23690.8475998644. The cubic root of 561256260 is about 824.8729574808.

The spelling of 561256260 in words is "five hundred sixty-one million, two hundred fifty-six thousand, two hundred sixty".