25304139 has 30 divisors (see below), whose sum is σ = 42676036. Its totient is φ = 14447160.

The previous prime is 25304137. The next prime is 25304159. The reversal of 25304139 is 93140352.

It is not a de Polignac number, because 25304139 - 2¹ = 25304137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25304137) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 21024 + ... + 22194.

Almost surely, 2^25304139 is an apocalyptic number.

25304139 is a deficient number, since it is larger than the sum of its proper divisors (17371897).

25304139 is an equidigital number, since it uses as much as digits as its factorization.

25304139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 25304139 is about 5030.3219578870. The cubic root of 25304139 is about 293.5827414206.

The spelling of 25304139 in words is "twenty-five million, three hundred four thousand, one hundred thirty-nine".