25420512 has 48 divisors (see below), whose sum is σ = 71865360. Its totient is φ = 7821312.

The previous prime is 25420511. The next prime is 25420523. The reversal of 25420512 is 21502452.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25420511) 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, 8937 + ... + 11432.

It is an arithmetic number, because the mean of its divisors is an integer number (1497195).

Almost surely, 2^25420512 is an apocalyptic number.

It is an amenable number.

25420512 is an abundant number, since it is smaller than the sum of its proper divisors (46444848).

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

25420512 is a wasteful number, since it uses less digits than its factorization.

25420512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20395 (or 20387 counting only the distinct ones).

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

The square root of 25420512 is about 5041.8758413908. The cubic root of 25420512 is about 294.0321127402.

Adding to 25420512 its reverse (21502452), we get a palindrome (46922964).

The spelling of 25420512 in words is "twenty-five million, four hundred twenty thousand, five hundred twelve".