425921994 has 12 divisors (see below), whose sum is σ = 922831026. Its totient is φ = 141973992.

The previous prime is 425921987. The next prime is 425921999. The reversal of 425921994 is 499129524.

425921994 is a `hidden beast` number, since 42 + 592 + 19 + 9 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 265266369 + 160655625 = 16287^2 + 12675^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (425921999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11831149 + ... + 11831184.

Almost surely, 2^425921994 is an apocalyptic number.

425921994 is an abundant number, since it is smaller than the sum of its proper divisors (496909032).

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

425921994 is a wasteful number, since it uses less digits than its factorization.

425921994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23662341 (or 23662338 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 425921994 is about 20637.8776525107. The cubic root of 425921994 is about 752.3905906723.

The spelling of 425921994 in words is "four hundred twenty-five million, nine hundred twenty-one thousand, nine hundred ninety-four".