25668251 has 16 divisors (see below), whose sum is σ = 30474240. Its totient is φ = 21163680.

The previous prime is 25668239. The next prime is 25668263. The reversal of 25668251 is 15286652.

It is an interprime number because it is at equal distance from previous prime (25668239) and next prime (25668263).

It is a cyclic number.

It is not a de Polignac number, because 25668251 - 2¹⁰ = 25667227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25668211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19430 + ... + 20708.

It is an arithmetic number, because the mean of its divisors is an integer number (1904640).

Almost surely, 2^25668251 is an apocalyptic number.

25668251 is a deficient number, since it is larger than the sum of its proper divisors (4805989).

25668251 is a wasteful number, since it uses less digits than its factorization.

25668251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394.

The product of its digits is 28800, while the sum is 35.

The square root of 25668251 is about 5066.3844109976. The cubic root of 25668251 is about 294.9842029270.

The spelling of 25668251 in words is "twenty-five million, six hundred sixty-eight thousand, two hundred fifty-one".