421503812 has 12 divisors (see below), whose sum is σ = 740854380. Its totient is φ = 209831136.

The previous prime is 421503799. The next prime is 421503833. The reversal of 421503812 is 218305124.

It can be written as a sum of positive squares in 2 ways, for example, as 318765316 + 102738496 = 17854^2 + 10136^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229163 + ... + 230994.

It is an arithmetic number, because the mean of its divisors is an integer number (61737865).

Almost surely, 2^421503812 is an apocalyptic number.

It is an amenable number.

421503812 is a deficient number, since it is larger than the sum of its proper divisors (319350568).

421503812 is a wasteful number, since it uses less digits than its factorization.

421503812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460390 (or 460388 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 421503812 is about 20530.5580050811. The cubic root of 421503812 is about 749.7799721974.

Adding to 421503812 its reverse (218305124), we get a palindrome (639808936).

The spelling of 421503812 in words is "four hundred twenty-one million, five hundred three thousand, eight hundred twelve".