421403252 has 24 divisors (see below), whose sum is σ = 758419200. Its totient is φ = 204792896.

The previous prime is 421403251. The next prime is 421403303. The reversal of 421403252 is 252304124.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421403251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10973 + ... + 31035.

It is an arithmetic number, because the mean of its divisors is an integer number (31600800).

Almost surely, 2^421403252 is an apocalyptic number.

It is an amenable number.

421403252 is a deficient number, since it is larger than the sum of its proper divisors (337015948).

421403252 is a wasteful number, since it uses less digits than its factorization.

421403252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20215 (or 20213 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 421403252 is about 20528.1088266796. The cubic root of 421403252 is about 749.7203413640.

Adding to 421403252 its reverse (252304124), we get a palindrome (673707376).

The spelling of 421403252 in words is "four hundred twenty-one million, four hundred three thousand, two hundred fifty-two".