25123957 has 2 divisors, whose sum is σ = 25123958. Its totient is φ = 25123956.

The previous prime is 25123951. The next prime is 25123993. The reversal of 25123957 is 75932152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24990001 + 133956 = 4999^2 + 366^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25123957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25123951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12561978 + 12561979.

It is an arithmetic number, because the mean of its divisors is an integer number (12561979).

Almost surely, 2^25123957 is an apocalyptic number.

It is an amenable number.

25123957 is a deficient number, since it is larger than the sum of its proper divisors (1).

25123957 is an equidigital number, since it uses as much as digits as its factorization.

25123957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 34.

The square root of 25123957 is about 5012.3803726373. The cubic root of 25123957 is about 292.8842472407.

The spelling of 25123957 in words is "twenty-five million, one hundred twenty-three thousand, nine hundred fifty-seven".