25662251 has 2 divisors, whose sum is σ = 25662252. Its totient is φ = 25662250.

The previous prime is 25662239. The next prime is 25662277. The reversal of 25662251 is 15226652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25662251 is a prime.

It is a super-2 number, since 2×25662251² = 1317102252774002, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25662551) 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, 12831125 + 12831126.

It is an arithmetic number, because the mean of its divisors is an integer number (12831126).

Almost surely, 2^25662251 is an apocalyptic number.

25662251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25662251 is an equidigital number, since it uses as much as digits as its factorization.

25662251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The square root of 25662251 is about 5065.7922381401. The cubic root of 25662251 is about 294.9612167726.

The spelling of 25662251 in words is "twenty-five million, six hundred sixty-two thousand, two hundred fifty-one".