25140897 has 6 divisors (see below), whose sum is σ = 36314642. Its totient is φ = 16760592.

The previous prime is 25140889. The next prime is 25140901. The reversal of 25140897 is 79804152.

It can be written as a sum of positive squares in only one way, i.e., 21986721 + 3154176 = 4689^2 + 1776^2 .

It is not a de Polignac number, because 25140897 - 2³ = 25140889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25140847) 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, 1396708 + ... + 1396725.

Almost surely, 2^25140897 is an apocalyptic number.

It is an amenable number.

25140897 is a deficient number, since it is larger than the sum of its proper divisors (11173745).

25140897 is a wasteful number, since it uses less digits than its factorization.

25140897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793439 (or 2793436 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 25140897 is about 5014.0699037808. The cubic root of 25140897 is about 292.9500588545.

The spelling of 25140897 in words is "twenty-five million, one hundred forty thousand, eight hundred ninety-seven".