561254764 has 12 divisors (see below), whose sum is σ = 1122509584. Its totient is φ = 240537744.

The previous prime is 561254761. The next prime is 561254807. The reversal of 561254764 is 467452165.

It is a happy number.

561254764 is an admirable number.

It is a super-2 number, since 2×561254764² = 630013820225391392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (561254761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10022379 + ... + 10022434.

Almost surely, 2^561254764 is an apocalyptic number.

It is an amenable number.

561254764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

561254764 is a wasteful number, since it uses less digits than its factorization.

561254764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20044824 (or 20044822 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 561254764 is about 23690.8160264690. The cubic root of 561254764 is about 824.8722245945.

The spelling of 561254764 in words is "five hundred sixty-one million, two hundred fifty-four thousand, seven hundred sixty-four".