421417128 has 32 divisors (see below), whose sum is σ = 1149320160. Its totient is φ = 127702080.

The previous prime is 421417111. The next prime is 421417141. The reversal of 421417128 is 821714124.

It is a super-3 number, since 3×421417128³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421417095 and 421417104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 797875 + ... + 798402.

It is an arithmetic number, because the mean of its divisors is an integer number (35916255).

Almost surely, 2^421417128 is an apocalyptic number.

It is an amenable number.

421417128 is an abundant number, since it is smaller than the sum of its proper divisors (727903032).

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

421417128 is a wasteful number, since it uses less digits than its factorization.

421417128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596297 (or 1596293 counting only the distinct ones).

The product of its digits is 3584, while the sum is 30.

The square root of 421417128 is about 20528.4467995024. The cubic root of 421417128 is about 749.7285702241.

The spelling of 421417128 in words is "four hundred twenty-one million, four hundred seventeen thousand, one hundred twenty-eight".