421006100 has 18 divisors (see below), whose sum is σ = 913583454. Its totient is φ = 168402400.

The previous prime is 421006067. The next prime is 421006141. The reversal of 421006100 is 1600124.

It can be written as a sum of positive squares in 3 ways, for example, as 7941124 + 413064976 = 2818^2 + 20324^2 .

It is a super-2 number, since 2×421006100² = 354492272474420000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2104931 + ... + 2105130.

Almost surely, 2^421006100 is an apocalyptic number.

It is an amenable number.

421006100 is an abundant number, since it is smaller than the sum of its proper divisors (492577354).

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

421006100 is a wasteful number, since it uses less digits than its factorization.

421006100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210075 (or 4210068 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 421006100 is about 20518.4331760493. The cubic root of 421006100 is about 749.4847423902.

Adding to 421006100 its reverse (1600124), we get a palindrome (422606224).

The spelling of 421006100 in words is "four hundred twenty-one million, six thousand, one hundred".