25245239 has 4 divisors (see below), whose sum is σ = 25315920. Its totient is φ = 25174560.

The previous prime is 25245229. The next prime is 25245247. The reversal of 25245239 is 93254252.

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

It is a cyclic number.

It is not a de Polignac number, because 25245239 - 2²⁰ = 24196663 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 (25245229) 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, 34802 + ... + 35519.

It is an arithmetic number, because the mean of its divisors is an integer number (6328980).

Almost surely, 2^25245239 is an apocalyptic number.

25245239 is a deficient number, since it is larger than the sum of its proper divisors (70681).

25245239 is an equidigital number, since it uses as much as digits as its factorization.

25245239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70680.

The product of its digits is 21600, while the sum is 32.

The square root of 25245239 is about 5024.4640510208. The cubic root of 25245239 is about 293.3547753208.

The spelling of 25245239 in words is "twenty-five million, two hundred forty-five thousand, two hundred thirty-nine".