421285684 has 6 divisors (see below), whose sum is σ = 737249954. Its totient is φ = 210642840.

The previous prime is 421285661. The next prime is 421285751. The reversal of 421285684 is 486582124.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 416568100 + 4717584 = 20410^2 + 2172^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52660707 + ... + 52660714.

Almost surely, 2^421285684 is an apocalyptic number.

It is an amenable number.

421285684 is a deficient number, since it is larger than the sum of its proper divisors (315964270).

421285684 is a wasteful number, since it uses less digits than its factorization.

421285684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105321425 (or 105321423 counting only the distinct ones).

The product of its digits is 122880, while the sum is 40.

The square root of 421285684 is about 20525.2450411682. The cubic root of 421285684 is about 749.6506129672.

The spelling of 421285684 in words is "four hundred twenty-one million, two hundred eighty-five thousand, six hundred eighty-four".