25072961 has 2 divisors, whose sum is σ = 25072962. Its totient is φ = 25072960.

The previous prime is 25072937. The next prime is 25072969. The reversal of 25072961 is 16927052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24010000 + 1062961 = 4900^2 + 1031^2 .

It is a cyclic number.

It is not a de Polignac number, because 25072961 - 2¹⁸ = 24810817 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

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

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25072969) 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 as a sum of consecutive naturals, namely, 12536480 + 12536481.

It is an arithmetic number, because the mean of its divisors is an integer number (12536481).

Almost surely, 2^25072961 is an apocalyptic number.

It is an amenable number.

25072961 is a deficient number, since it is larger than the sum of its proper divisors (1).

25072961 is an equidigital number, since it uses as much as digits as its factorization.

25072961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 25072961 is about 5007.2907844462. The cubic root of 25072961 is about 292.6859498943.

The spelling of 25072961 in words is "twenty-five million, seventy-two thousand, nine hundred sixty-one".