25240402 has 16 divisors (see below), whose sum is σ = 42083712. Its totient is φ = 11255920.

The previous prime is 25240399. The next prime is 25240403. The reversal of 25240402 is 20404252.

It is a self number, because there is not a number n which added to its sum of digits gives 25240402.

It is not an unprimeable number, because it can be changed into a prime (25240403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9658 + ... + 11989.

It is an arithmetic number, because the mean of its divisors is an integer number (2630232).

Almost surely, 2^25240402 is an apocalyptic number.

25240402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25240402 is a deficient number, since it is larger than the sum of its proper divisors (16843310).

25240402 is a wasteful number, since it uses less digits than its factorization.

25240402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21713.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 25240402 is about 5023.9826830912. The cubic root of 25240402 is about 293.3360384852.

Adding to 25240402 its reverse (20404252), we get a palindrome (45644654).

The spelling of 25240402 in words is "twenty-five million, two hundred forty thousand, four hundred two".