25397271 has 6 divisors (see below), whose sum is σ = 36684960. Its totient is φ = 16931508.

The previous prime is 25397263. The next prime is 25397279. The reversal of 25397271 is 17279352.

It is an interprime number because it is at equal distance from previous prime (25397263) and next prime (25397279).

It is not a de Polignac number, because 25397271 - 2³ = 25397263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25397279) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1410951 + ... + 1410968.

It is an arithmetic number, because the mean of its divisors is an integer number (6114160).

Almost surely, 2^25397271 is an apocalyptic number.

25397271 is a deficient number, since it is larger than the sum of its proper divisors (11287689).

25397271 is a wasteful number, since it uses less digits than its factorization.

25397271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821925 (or 2821922 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 25397271 is about 5039.5705174151. The cubic root of 25397271 is about 293.9424779870.

The spelling of 25397271 in words is "twenty-five million, three hundred ninety-seven thousand, two hundred seventy-one".