420661456 has 40 divisors (see below), whose sum is σ = 824947200. Its totient is φ = 207790080.

The previous prime is 420661453. The next prime is 420661457. The reversal of 420661456 is 654166024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420661453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546640 + ... + 547408.

It is an arithmetic number, because the mean of its divisors is an integer number (20623680).

Almost surely, 2^420661456 is an apocalyptic number.

It is an amenable number.

420661456 is a deficient number, since it is larger than the sum of its proper divisors (404285744).

420661456 is a wasteful number, since it uses less digits than its factorization.

420661456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1141 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 420661456 is about 20510.0330570187. The cubic root of 420661456 is about 749.2801721664.

The spelling of 420661456 in words is "four hundred twenty million, six hundred sixty-one thousand, four hundred fifty-six".