25635251 has 2 divisors, whose sum is σ = 25635252. Its totient is φ = 25635250.

The previous prime is 25635241. The next prime is 25635277. The reversal of 25635251 is 15253652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25635251 - 2¹⁰ = 25634227 is a prime.

It is not a weakly prime, because it can be changed into another prime (25635221) 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, 12817625 + 12817626.

It is an arithmetic number, because the mean of its divisors is an integer number (12817626).

Almost surely, 2^25635251 is an apocalyptic number.

25635251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25635251 is an equidigital number, since it uses as much as digits as its factorization.

25635251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 29.

The square root of 25635251 is about 5063.1266031969. The cubic root of 25635251 is about 294.8577347161.

The spelling of 25635251 in words is "twenty-five million, six hundred thirty-five thousand, two hundred fifty-one".