25400251 has 2 divisors, whose sum is σ = 25400252. Its totient is φ = 25400250.

The previous prime is 25400233. The next prime is 25400269. The reversal of 25400251 is 15200452.

It is a balanced prime because it is at equal distance from previous prime (25400233) and next prime (25400269).

It is a cyclic number.

It is not a de Polignac number, because 25400251 - 2⁹ = 25399739 is a prime.

It is not a weakly prime, because it can be changed into another prime (25400281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12700125 + 12700126.

It is an arithmetic number, because the mean of its divisors is an integer number (12700126).

Almost surely, 2^25400251 is an apocalyptic number.

25400251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25400251 is an equidigital number, since it uses as much as digits as its factorization.

25400251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 25400251 is about 5039.8661688581. The cubic root of 25400251 is about 293.9539741608.

It can be divided in two parts, 25400 and 251, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 25400251 in words is "twenty-five million, four hundred thousand, two hundred fifty-one".