421656426 has 12 divisors (see below), whose sum is σ = 913588962. Its totient is φ = 140552136.

The previous prime is 421656419. The next prime is 421656503. The reversal of 421656426 is 624656124.

421656426 is a `hidden beast` number, since 4 + 2 + 1 + 6 + 5 + 642 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 290668401 + 130988025 = 17049^2 + 11445^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11712661 + ... + 11712696.

Almost surely, 2^421656426 is an apocalyptic number.

421656426 is an abundant number, since it is smaller than the sum of its proper divisors (491932536).

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

421656426 is a wasteful number, since it uses less digits than its factorization.

421656426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23425365 (or 23425362 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 421656426 is about 20534.2744210746. The cubic root of 421656426 is about 749.8704522911.

The spelling of 421656426 in words is "four hundred twenty-one million, six hundred fifty-six thousand, four hundred twenty-six".