25625641 has 2 divisors, whose sum is σ = 25625642. Its totient is φ = 25625640.

The previous prime is 25625627. The next prime is 25625651. The reversal of 25625641 is 14652652.

25625641 = 3579² + 3580².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12816400 + 12809241 = 3580^2 + 3579^2 .

It is a cyclic number.

It is not a de Polignac number, because 25625641 - 2⁷ = 25625513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25625651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12812820 + 12812821.

It is an arithmetic number, because the mean of its divisors is an integer number (12812821).

Almost surely, 2^25625641 is an apocalyptic number.

25625641 is the 3580-th centered square number.

It is an amenable number.

25625641 is a deficient number, since it is larger than the sum of its proper divisors (1).

25625641 is an equidigital number, since it uses as much as digits as its factorization.

25625641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 31.

The square root of 25625641 is about 5062.1774959004. The cubic root of 25625641 is about 294.8208852364.

The spelling of 25625641 in words is "twenty-five million, six hundred twenty-five thousand, six hundred forty-one".