421240100 has 18 divisors (see below), whose sum is σ = 914091234. Its totient is φ = 168496000.

The previous prime is 421240081. The next prime is 421240103. The reversal of 421240100 is 1042124.

It can be written as a sum of positive squares in 3 ways, for example, as 87616 + 421152484 = 296^2 + 20522^2 .

It is not an unprimeable number, because it can be changed into a prime (421240103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2106101 + ... + 2106300.

Almost surely, 2^421240100 is an apocalyptic number.

It is an amenable number.

421240100 is an abundant number, since it is smaller than the sum of its proper divisors (492851134).

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

421240100 is a wasteful number, since it uses less digits than its factorization.

421240100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212415 (or 4212408 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 421240100 is about 20524.1345737159. The cubic root of 421240100 is about 749.6235740659.

Adding to 421240100 its reverse (1042124), we get a palindrome (422282224).

The spelling of 421240100 in words is "four hundred twenty-one million, two hundred forty thousand, one hundred".