421406406 has 24 divisors (see below), whose sum is σ = 915604560. Its totient is φ = 140075376.

The previous prime is 421406389. The next prime is 421406413. The reversal of 421406406 is 604604124.

421406406 is a `hidden beast` number, since 4 + 2 + 14 + 0 + 640 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 421406406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26145 + ... + 39068.

It is an arithmetic number, because the mean of its divisors is an integer number (38150190).

Almost surely, 2^421406406 is an apocalyptic number.

421406406 is an abundant number, since it is smaller than the sum of its proper divisors (494198154).

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

421406406 is a wasteful number, since it uses less digits than its factorization.

421406406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65580 (or 65577 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 421406406 is about 20528.1856480304. The cubic root of 421406406 is about 749.7222117910.

The spelling of 421406406 in words is "four hundred twenty-one million, four hundred six thousand, four hundred six".