25422520 has 16 divisors (see below), whose sum is σ = 57200760. Its totient is φ = 10168992.

The previous prime is 25422499. The next prime is 25422533. The reversal of 25422520 is 2522452.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25422491 and 25422500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317742 + ... + 317821.

Almost surely, 2^25422520 is an apocalyptic number.

25422520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25422520 is an abundant number, since it is smaller than the sum of its proper divisors (31778240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25422520 is a wasteful number, since it uses less digits than its factorization.

25422520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635574 (or 635570 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 25422520 is about 5042.0749696925. The cubic root of 25422520 is about 294.0398545320.

Adding to 25422520 its reverse (2522452), we get a palindrome (27944972).

The spelling of 25422520 in words is "twenty-five million, four hundred twenty-two thousand, five hundred twenty".