561263125 has 20 divisors (see below), whose sum is σ = 704674432. Its totient is φ = 446886000.

The previous prime is 561263083. The next prime is 561263147. The reversal of 561263125 is 521362165.

It is not a de Polignac number, because 561263125 - 2²⁵ = 527708693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 137362 + ... + 141388.

Almost surely, 2^561263125 is an apocalyptic number.

It is an amenable number.

561263125 is a deficient number, since it is larger than the sum of its proper divisors (143411307).

561263125 is an equidigital number, since it uses as much as digits as its factorization.

561263125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270 (or 4255 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 561263125 is about 23690.9924865971. The cubic root of 561263125 is about 824.8763206087.

The spelling of 561263125 in words is "five hundred sixty-one million, two hundred sixty-three thousand, one hundred twenty-five".