25139345 has 64 divisors (see below), whose sum is σ = 41803776. Its totient is φ = 14023680.

The previous prime is 25139341. The next prime is 25139347. The reversal of 25139345 is 54393152.

25139345 = 103² + 104² + ... + 424².

It is not a de Polignac number, because 25139345 - 2² = 25139341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25139341) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 150452 + ... + 150618.

It is an arithmetic number, because the mean of its divisors is an integer number (653184).

Almost surely, 2^25139345 is an apocalyptic number.

It is an amenable number.

25139345 is a deficient number, since it is larger than the sum of its proper divisors (16664431).

25139345 is a wasteful number, since it uses less digits than its factorization.

25139345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230.

The product of its digits is 16200, while the sum is 32.

The square root of 25139345 is about 5013.9151368965. The cubic root of 25139345 is about 292.9440305911.

The spelling of 25139345 in words is "twenty-five million, one hundred thirty-nine thousand, three hundred forty-five".