421169994 has 36 divisors (see below), whose sum is σ = 1061522514. Its totient is φ = 120334032.

The previous prime is 421169989. The next prime is 421170067. The reversal of 421169994 is 499961124.

It can be written as a sum of positive squares in only one way, i.e., 214241769 + 206928225 = 14637^2 + 14385^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 237877 + ... + 239640.

Almost surely, 2^421169994 is an apocalyptic number.

421169994 is an abundant number, since it is smaller than the sum of its proper divisors (640352520).

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

421169994 is a wasteful number, since it uses less digits than its factorization.

421169994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477539 (or 477529 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 421169994 is about 20522.4266109054. The cubic root of 421169994 is about 749.5819857287.

The spelling of 421169994 in words is "four hundred twenty-one million, one hundred sixty-nine thousand, nine hundred ninety-four".