25371391 has 2 divisors, whose sum is σ = 25371392. Its totient is φ = 25371390.

The previous prime is 25371389. The next prime is 25371407. The reversal of 25371391 is 19317352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25371391 - 2¹ = 25371389 is a prime.

Together with 25371389, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25371371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12685695 + 12685696.

It is an arithmetic number, because the mean of its divisors is an integer number (12685696).

Almost surely, 2^25371391 is an apocalyptic number.

25371391 is a deficient number, since it is larger than the sum of its proper divisors (1).

25371391 is an equidigital number, since it uses as much as digits as its factorization.

25371391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 31.

The square root of 25371391 is about 5037.0021838391. The cubic root of 25371391 is about 293.8426008947.

The spelling of 25371391 in words is "twenty-five million, three hundred seventy-one thousand, three hundred ninety-one".