561040120 has 32 divisors (see below), whose sum is σ = 1336597200. Its totient is φ = 211214848.

The previous prime is 561040097. The next prime is 561040133. The reversal of 561040120 is 21040165.

It is a super-2 number, since 2×561040120² = 629532032499228800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411850 + ... + 413209.

Almost surely, 2^561040120 is an apocalyptic number.

It is an amenable number.

561040120 is an abundant number, since it is smaller than the sum of its proper divisors (775557080).

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

561040120 is a wasteful number, since it uses less digits than its factorization.

561040120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825087 (or 825083 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 561040120 is about 23686.2854833762. The cubic root of 561040120 is about 824.7670575886.

Adding to 561040120 its reverse (21040165), we get a palindrome (582080285).

The spelling of 561040120 in words is "five hundred sixty-one million, forty thousand, one hundred twenty".