421387522 has 16 divisors (see below), whose sum is σ = 642462912. Its totient is φ = 207242640.

The previous prime is 421387513. The next prime is 421387541. The reversal of 421387522 is 225783124.

It is a happy 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, 108372 + ... + 112192.

It is an arithmetic number, because the mean of its divisors is an integer number (40153932).

Almost surely, 2^421387522 is an apocalyptic number.

421387522 is a deficient number, since it is larger than the sum of its proper divisors (221075390).

421387522 is a wasteful number, since it uses less digits than its factorization.

421387522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4713.

The product of its digits is 26880, while the sum is 34.

The square root of 421387522 is about 20527.7256899053. The cubic root of 421387522 is about 749.7110128110.

The spelling of 421387522 in words is "four hundred twenty-one million, three hundred eighty-seven thousand, five hundred twenty-two".