405421564 has 6 divisors (see below), whose sum is σ = 709487744. Its totient is φ = 202710780.

The previous prime is 405421547. The next prime is 405421579. The reversal of 405421564 is 465124504.

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 as a sum of consecutive naturals, namely, 50677692 + ... + 50677699.

Almost surely, 2^405421564 is an apocalyptic number.

It is an amenable number.

405421564 is a deficient number, since it is larger than the sum of its proper divisors (304066180).

405421564 is a wasteful number, since it uses less digits than its factorization.

405421564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101355395 (or 101355393 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 405421564 is about 20135.0829151509. The cubic root of 405421564 is about 740.1202409920.

The spelling of 405421564 in words is "four hundred five million, four hundred twenty-one thousand, five hundred sixty-four".