421244636 has 12 divisors (see below), whose sum is σ = 751087512. Its totient is φ = 206648208.

The previous prime is 421244627. The next prime is 421244657. The reversal of 421244636 is 636442124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 993290 + ... + 993713.

It is an arithmetic number, because the mean of its divisors is an integer number (62590626).

Almost surely, 2^421244636 is an apocalyptic number.

It is an amenable number.

421244636 is a deficient number, since it is larger than the sum of its proper divisors (329842876).

421244636 is a wasteful number, since it uses less digits than its factorization.

421244636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987060 (or 1987058 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

The square root of 421244636 is about 20524.2450774687. The cubic root of 421244636 is about 749.6262647565.

The spelling of 421244636 in words is "four hundred twenty-one million, two hundred forty-four thousand, six hundred thirty-six".