420721912 has 32 divisors (see below), whose sum is σ = 850938480. Its totient is φ = 193858560.

The previous prime is 420721909. The next prime is 420721919. The reversal of 420721912 is 219127024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420721919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66987 + ... + 72997.

Almost surely, 2^420721912 is an apocalyptic number.

It is an amenable number.

420721912 is an abundant number, since it is smaller than the sum of its proper divisors (430216568).

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

420721912 is a wasteful number, since it uses less digits than its factorization.

420721912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703 (or 6699 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 420721912 is about 20511.5068193441. The cubic root of 420721912 is about 749.3160650929.

Adding to 420721912 its reverse (219127024), we get a palindrome (639848936).

The spelling of 420721912 in words is "four hundred twenty million, seven hundred twenty-one thousand, nine hundred twelve".