525402420 has 24 divisors (see below), whose sum is σ = 1471126944. Its totient is φ = 140107296.

The previous prime is 525402419. The next prime is 525402431. The reversal of 525402420 is 24204525.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4378294 + ... + 4378413.

It is an arithmetic number, because the mean of its divisors is an integer number (61296956).

Almost surely, 2^525402420 is an apocalyptic number.

It is an amenable number.

525402420 is an abundant number, since it is smaller than the sum of its proper divisors (945724524).

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

525402420 is a wasteful number, since it uses less digits than its factorization.

525402420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8756719 (or 8756717 counting only the distinct ones).

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

The square root of 525402420 is about 22921.6583169717. The cubic root of 525402420 is about 806.9203897212.

Adding to 525402420 its reverse (24204525), we get a palindrome (549606945).

The spelling of 525402420 in words is "five hundred twenty-five million, four hundred two thousand, four hundred twenty".