25135437 has 4 divisors (see below), whose sum is σ = 33513920. Its totient is φ = 16756956.

The previous prime is 25135417. The next prime is 25135441. The reversal of 25135437 is 73453152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25135437 - 2⁸ = 25135181 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 (25135417) 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, 4189237 + ... + 4189242.

It is an arithmetic number, because the mean of its divisors is an integer number (8378480).

Almost surely, 2^25135437 is an apocalyptic number.

It is an amenable number.

25135437 is a deficient number, since it is larger than the sum of its proper divisors (8378483).

25135437 is an equidigital number, since it uses as much as digits as its factorization.

25135437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8378482.

The product of its digits is 12600, while the sum is 30.

The square root of 25135437 is about 5013.5254063383. The cubic root of 25135437 is about 292.9288500763.

Adding to 25135437 its reverse (73453152), we get a palindrome (98588589).

The spelling of 25135437 in words is "twenty-five million, one hundred thirty-five thousand, four hundred thirty-seven".