25012439 has 4 divisors (see below), whose sum is σ = 25024224. Its totient is φ = 25000656.

The previous prime is 25012433. The next prime is 25012441. The reversal of 25012439 is 93421052.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25012439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25012433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1727 + ... + 7280.

It is an arithmetic number, because the mean of its divisors is an integer number (6256056).

Almost surely, 2^25012439 is an apocalyptic number.

25012439 is a deficient number, since it is larger than the sum of its proper divisors (11785).

25012439 is an equidigital number, since it uses as much as digits as its factorization.

25012439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11784.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 25012439 is about 5001.2437453098. The cubic root of 25012439 is about 292.4502615892.

The spelling of 25012439 in words is "twenty-five million, twelve thousand, four hundred thirty-nine".