25520412 has 24 divisors (see below), whose sum is σ = 59665536. Its totient is φ = 8489968.

The previous prime is 25520381. The next prime is 25520419. The reversal of 25520412 is 21402552.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25520419) 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 7 ways as a sum of consecutive naturals, for example, 5233 + ... + 8855.

It is an arithmetic number, because the mean of its divisors is an integer number (2486064).

Almost surely, 2^25520412 is an apocalyptic number.

It is an amenable number.

25520412 is an abundant number, since it is smaller than the sum of its proper divisors (34145124).

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

25520412 is a wasteful number, since it uses less digits than its factorization.

25520412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217 (or 4215 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 25520412 is about 5051.7731540520. The cubic root of 25520412 is about 294.4167812731.

Adding to 25520412 its reverse (21402552), we get a palindrome (46922964).

The spelling of 25520412 in words is "twenty-five million, five hundred twenty thousand, four hundred twelve".