561401025 has 24 divisors (see below), whose sum is σ = 940907040. Its totient is φ = 295309440.

The previous prime is 561401021. The next prime is 561401033. The reversal of 561401025 is 520104165.

It is not a de Polignac number, because 561401025 - 2² = 561401021 is a prime.

It is a super-2 number, since 2×561401025² = 630342221742101250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 561400986 and 561401004.

It is not an unprimeable number, because it can be changed into a prime (561401021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45795 + ... + 56744.

It is an arithmetic number, because the mean of its divisors is an integer number (39204460).

Almost surely, 2^561401025 is an apocalyptic number.

It is an amenable number.

561401025 is a deficient number, since it is larger than the sum of its proper divisors (379506015).

561401025 is a wasteful number, since it uses less digits than its factorization.

561401025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102625 (or 102620 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 561401025 is about 23693.9026966855. The cubic root of 561401025 is about 824.9438712962.

The spelling of 561401025 in words is "five hundred sixty-one million, four hundred one thousand, twenty-five".