421344656 has 10 divisors (see below), whose sum is σ = 816355302. Its totient is φ = 210672320.

The previous prime is 421344617. The next prime is 421344667. The reversal of 421344656 is 656443124.

It can be written as a sum of positive squares in only one way, i.e., 403367056 + 17977600 = 20084^2 + 4240^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13167005 + ... + 13167036.

Almost surely, 2^421344656 is an apocalyptic number.

It is an amenable number.

421344656 is a deficient number, since it is larger than the sum of its proper divisors (395010646).

421344656 is a wasteful number, since it uses less digits than its factorization.

421344656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26334049 (or 26334043 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

The square root of 421344656 is about 20526.6815632727. The cubic root of 421344656 is about 749.6855902879.

The spelling of 421344656 in words is "four hundred twenty-one million, three hundred forty-four thousand, six hundred fifty-six".