561445172 has 12 divisors (see below), whose sum is σ = 992068896. Its totient is φ = 277996920.

The previous prime is 561445169. The next prime is 561445189. The reversal of 561445172 is 271544165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680954 + ... + 681777.

It is an arithmetic number, because the mean of its divisors is an integer number (82672408).

Almost surely, 2^561445172 is an apocalyptic number.

It is an amenable number.

561445172 is a deficient number, since it is larger than the sum of its proper divisors (430623724).

561445172 is a wasteful number, since it uses less digits than its factorization.

561445172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362838 (or 1362836 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 561445172 is about 23694.8342893551. The cubic root of 561445172 is about 824.9654944858.

It can be divided in two parts, 56144 and 5172, that added together give a palindrome (61316).

The spelling of 561445172 in words is "five hundred sixty-one million, four hundred forty-five thousand, one hundred seventy-two".