421214403 has 4 divisors (see below), whose sum is σ = 561619208. Its totient is φ = 280809600.

The previous prime is 421214399. The next prime is 421214407. The reversal of 421214403 is 304412124.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (421214399) and next prime (421214407).

It is not a de Polignac number, because 421214403 - 2² = 421214399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421214403.

It is not an unprimeable number, because it can be changed into a prime (421214407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70202398 + ... + 70202403.

It is an arithmetic number, because the mean of its divisors is an integer number (140404802).

Almost surely, 2^421214403 is an apocalyptic number.

421214403 is a deficient number, since it is larger than the sum of its proper divisors (140404805).

421214403 is a wasteful number, since it uses less digits than its factorization.

421214403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140404804.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 421214403 is about 20523.5085450807. The cubic root of 421214403 is about 749.6083306068.

Adding to 421214403 its reverse (304412124), we get a palindrome (725626527).

The spelling of 421214403 in words is "four hundred twenty-one million, two hundred fourteen thousand, four hundred three".