421423936 has 14 divisors (see below), whose sum is σ = 836263250. Its totient is φ = 210711936.

The previous prime is 421423907. The next prime is 421423939. The reversal of 421423936 is 639324124.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 297769536 + 123654400 = 17256^2 + 11120^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421423939) by changing a digit.

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 as a sum of consecutive naturals, namely, 3292311 + ... + 3292438.

Almost surely, 2^421423936 is an apocalyptic number.

It is an amenable number.

421423936 is a deficient number, since it is larger than the sum of its proper divisors (414839314).

421423936 is an equidigital number, since it uses as much as digits as its factorization.

421423936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584761 (or 6584751 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 421423936 is about 20528.6126175151. The cubic root of 421423936 is about 749.7326074945.

The spelling of 421423936 in words is "four hundred twenty-one million, four hundred twenty-three thousand, nine hundred thirty-six".