25442520 has 64 divisors (see below), whose sum is σ = 80352000. Its totient is φ = 6427008.

The previous prime is 25442497. The next prime is 25442563. The reversal of 25442520 is 2524452.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3300 + ... + 7859.

It is an arithmetic number, because the mean of its divisors is an integer number (1255500).

Almost surely, 2^25442520 is an apocalyptic number.

25442520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25442520 is an abundant number, since it is smaller than the sum of its proper divisors (54909480).

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

25442520 is a wasteful number, since it uses less digits than its factorization.

25442520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11192 (or 11188 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 25442520 is about 5044.0578902308. The cubic root of 25442520 is about 294.1169417709.

Adding to 25442520 its reverse (2524452), we get a palindrome (27966972).

The spelling of 25442520 in words is "twenty-five million, four hundred forty-two thousand, five hundred twenty".