421428512 has 54 divisors (see below), whose sum is σ = 880262019. Its totient is φ = 198578880.

The previous prime is 421428481. The next prime is 421428533. The reversal of 421428512 is 215824124.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 210714256 + 210714256 = 14516^2 + 14516^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=14516.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2206337 + ... + 2206527.

Almost surely, 2^421428512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421428512

421428512 is an abundant number, since it is smaller than the sum of its proper divisors (458833507).

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

421428512 is an equidigital number, since it uses as much as digits as its factorization.

421428512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 212 counting only the distinct ones).

The product of its digits is 5120, while the sum is 29.

The square root of 421428512 is about 20528.7240714078. The cubic root of 421428512 is about 749.7353211230.

The spelling of 421428512 in words is "four hundred twenty-one million, four hundred twenty-eight thousand, five hundred twelve".