421286836 has 6 divisors (see below), whose sum is σ = 737251970. Its totient is φ = 210643416.

The previous prime is 421286783. The next prime is 421286851. The reversal of 421286836 is 638682124.

It can be written as a sum of positive squares in only one way, i.e., 380250000 + 41036836 = 19500^2 + 6406^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52660851 + ... + 52660858.

Almost surely, 2^421286836 is an apocalyptic number.

It is an amenable number.

421286836 is a deficient number, since it is larger than the sum of its proper divisors (315965134).

421286836 is a wasteful number, since it uses less digits than its factorization.

421286836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105321713 (or 105321711 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 421286836 is about 20525.2731041514. The cubic root of 421286836 is about 749.6512962698.

The spelling of 421286836 in words is "four hundred twenty-one million, two hundred eighty-six thousand, eight hundred thirty-six".