25378957 has 2 divisors, whose sum is σ = 25378958. Its totient is φ = 25378956.

The previous prime is 25378939. The next prime is 25378981. The reversal of 25378957 is 75987352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13995081 + 11383876 = 3741^2 + 3374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25378957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25378657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12689478 + 12689479.

It is an arithmetic number, because the mean of its divisors is an integer number (12689479).

Almost surely, 2^25378957 is an apocalyptic number.

It is an amenable number.

25378957 is a deficient number, since it is larger than the sum of its proper divisors (1).

25378957 is an equidigital number, since it uses as much as digits as its factorization.

25378957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 46.

The square root of 25378957 is about 5037.7531698169. The cubic root of 25378957 is about 293.8718069161.

It can be divided in two parts, 25378 and 957, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 25378957 in words is "twenty-five million, three hundred seventy-eight thousand, nine hundred fifty-seven".