25056961 has 4 divisors (see below), whose sum is σ = 25131652. Its totient is φ = 24982272.

The previous prime is 25056947. The next prime is 25056979. The reversal of 25056961 is 16965052.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12673600 + 12383361 = 3560^2 + 3519^2 .

It is a cyclic number.

It is not a de Polignac number, because 25056961 - 2⁷ = 25056833 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25056901) 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, 36840 + ... + 37513.

It is an arithmetic number, because the mean of its divisors is an integer number (6282913).

Almost surely, 2^25056961 is an apocalyptic number.

It is an amenable number.

25056961 is a deficient number, since it is larger than the sum of its proper divisors (74691).

25056961 is an equidigital number, since it uses as much as digits as its factorization.

25056961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74690.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 25056961 is about 5005.6928591355. The cubic root of 25056961 is about 292.6236786734.

The spelling of 25056961 in words is "twenty-five million, fifty-six thousand, nine hundred sixty-one".