421634404 has 6 divisors (see below), whose sum is σ = 737860214. Its totient is φ = 210817200.

The previous prime is 421634401. The next prime is 421634407. The reversal of 421634404 is 404436124.

It is an interprime number because it is at equal distance from previous prime (421634401) and next prime (421634407).

It can be written as a sum of positive squares in only one way, i.e., 257538304 + 164096100 = 16048^2 + 12810^2 .

It is not an unprimeable number, because it can be changed into a prime (421634401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52704297 + ... + 52704304.

Almost surely, 2^421634404 is an apocalyptic number.

It is an amenable number.

421634404 is a deficient number, since it is larger than the sum of its proper divisors (316225810).

421634404 is a wasteful number, since it uses less digits than its factorization.

421634404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105408605 (or 105408603 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 421634404 is about 20533.7381886494. The cubic root of 421634404 is about 749.8573974803.

The spelling of 421634404 in words is "four hundred twenty-one million, six hundred thirty-four thousand, four hundred four".