25263139 has 16 divisors (see below), whose sum is σ = 29743200. Its totient is φ = 21199360.

The previous prime is 25263137. The next prime is 25263143. The reversal of 25263139 is 93136252.

It is a cyclic number.

It is not a de Polignac number, because 25263139 - 2¹ = 25263137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25263139.

It is not an unprimeable number, because it can be changed into a prime (25263137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8637 + ... + 11185.

It is an arithmetic number, because the mean of its divisors is an integer number (1858950).

Almost surely, 2^25263139 is an apocalyptic number.

25263139 is a deficient number, since it is larger than the sum of its proper divisors (4480061).

25263139 is a wasteful number, since it uses less digits than its factorization.

25263139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630.

The product of its digits is 9720, while the sum is 31.

The square root of 25263139 is about 5026.2450198931. The cubic root of 25263139 is about 293.4240928119.

It can be divided in two parts, 2526 and 3139, that added together give a palindrome (5665).

The spelling of 25263139 in words is "twenty-five million, two hundred sixty-three thousand, one hundred thirty-nine".