25139 has 4 divisors (see below), whose sum is σ = 26256. Its totient is φ = 24024.

The previous prime is 25127. The next prime is 25147. The reversal of 25139 is 93152.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25139 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 25139.

It is not an unprimeable number, because it can be changed into a prime (25169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524 + ... + 569.

It is an arithmetic number, because the mean of its divisors is an integer number (6564).

2²⁵¹³⁹ is an apocalyptic number.

25139 is a deficient number, since it is larger than the sum of its proper divisors (1117).

25139 is a wasteful number, since it uses less digits than its factorization.

25139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116.

The product of its digits is 270, while the sum is 20.

The square root of 25139 is about 158.5528303122. The cubic root of 25139 is about 29.2942690512.

The spelling of 25139 in words is "twenty-five thousand, one hundred thirty-nine".