25601957 has 2 divisors, whose sum is σ = 25601958. Its totient is φ = 25601956.

The previous prime is 25601951. The next prime is 25601977. The reversal of 25601957 is 75910652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22033636 + 3568321 = 4694^2 + 1889^2 .

It is a cyclic number.

It is not a de Polignac number, because 25601957 - 2⁴ = 25601941 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25601951) 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, 12800978 + 12800979.

It is an arithmetic number, because the mean of its divisors is an integer number (12800979).

Almost surely, 2^25601957 is an apocalyptic number.

It is an amenable number.

25601957 is a deficient number, since it is larger than the sum of its proper divisors (1).

25601957 is an equidigital number, since it uses as much as digits as its factorization.

25601957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 25601957 is about 5059.8376456167. The cubic root of 25601957 is about 294.7300297516.

The spelling of 25601957 in words is "twenty-five million, six hundred one thousand, nine hundred fifty-seven".