422925921 has 64 divisors (see below), whose sum is σ = 725760000. Its totient is φ = 240719040.

The previous prime is 422925911. The next prime is 422925929. The reversal of 422925921 is 129529224.

422925921 is a `hidden beast` number, since 42 + 29 + 2 + 592 + 1 = 666.

It is not a de Polignac number, because 422925921 - 2¹⁴ = 422909537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (422925929) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 840556 + ... + 841058.

It is an arithmetic number, because the mean of its divisors is an integer number (11340000).

Almost surely, 2^422925921 is an apocalyptic number.

It is an amenable number.

422925921 is a deficient number, since it is larger than the sum of its proper divisors (302834079).

422925921 is a wasteful number, since it uses less digits than its factorization.

422925921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 685 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 422925921 is about 20565.1628002309. The cubic root of 422925921 is about 750.6222515945.

The spelling of 422925921 in words is "four hundred twenty-two million, nine hundred twenty-five thousand, nine hundred twenty-one".