421512100 has 36 divisors (see below), whose sum is σ = 946228500. Its totient is φ = 162789760.

The previous prime is 421512067. The next prime is 421512137. The reversal of 421512100 is 1215124.

It can be written as a sum of positive squares in 6 ways, for example, as 22791076 + 398721024 = 4774^2 + 19968^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69775 + ... + 75574.

It is an arithmetic number, because the mean of its divisors is an integer number (26284125).

Almost surely, 2^421512100 is an apocalyptic number.

It is an amenable number.

421512100 is an abundant number, since it is smaller than the sum of its proper divisors (524716400).

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

421512100 is a wasteful number, since it uses less digits than its factorization.

421512100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145392 (or 145385 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 421512100 is about 20530.7598495526. The cubic root of 421512100 is about 749.7848864556.

Adding to 421512100 its reverse (1215124), we get a palindrome (422727224).

The spelling of 421512100 in words is "four hundred twenty-one million, five hundred twelve thousand, one hundred".