25629257 has 2 divisors, whose sum is σ = 25629258. Its totient is φ = 25629256.

The previous prime is 25629239. The next prime is 25629269. The reversal of 25629257 is 75292652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23001616 + 2627641 = 4796^2 + 1621^2 .

It is a cyclic number.

It is not a de Polignac number, because 25629257 - 2⁶ = 25629193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25629257.

It is not a weakly prime, because it can be changed into another prime (25629277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12814628 + 12814629.

It is an arithmetic number, because the mean of its divisors is an integer number (12814629).

Almost surely, 2^25629257 is an apocalyptic number.

It is an amenable number.

25629257 is a deficient number, since it is larger than the sum of its proper divisors (1).

25629257 is an equidigital number, since it uses as much as digits as its factorization.

25629257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 38.

The square root of 25629257 is about 5062.5346418568. The cubic root of 25629257 is about 294.8347518447.

The spelling of 25629257 in words is "twenty-five million, six hundred twenty-nine thousand, two hundred fifty-seven".