421751140 has 12 divisors (see below), whose sum is σ = 885677436. Its totient is φ = 168700448.

The previous prime is 421751117. The next prime is 421751173. The reversal of 421751140 is 41157124.

It can be written as a sum of positive squares in 2 ways, for example, as 214563904 + 207187236 = 14648^2 + 14394^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 10543759 + ... + 10543798.

It is an arithmetic number, because the mean of its divisors is an integer number (73806453).

Almost surely, 2^421751140 is an apocalyptic number.

It is an amenable number.

421751140 is an abundant number, since it is smaller than the sum of its proper divisors (463926296).

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

421751140 is a wasteful number, since it uses less digits than its factorization.

421751140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21087566 (or 21087564 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 421751140 is about 20536.5805332826. The cubic root of 421751140 is about 749.9265942972.

The spelling of 421751140 in words is "four hundred twenty-one million, seven hundred fifty-one thousand, one hundred forty".