421406456 has 16 divisors (see below), whose sum is σ = 799016400. Its totient is φ = 208335424.

The previous prime is 421406417. The next prime is 421406459. The reversal of 421406456 is 654604124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421406459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295220 + ... + 296643.

It is an arithmetic number, because the mean of its divisors is an integer number (49938525).

Almost surely, 2^421406456 is an apocalyptic number.

It is an amenable number.

421406456 is a deficient number, since it is larger than the sum of its proper divisors (377609944).

421406456 is a wasteful number, since it uses less digits than its factorization.

421406456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591958 (or 591954 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 421406456 is about 20528.1868658681. The cubic root of 421406456 is about 749.7222414426.

The spelling of 421406456 in words is "four hundred twenty-one million, four hundred six thousand, four hundred fifty-six".