421504212 has 48 divisors (see below), whose sum is σ = 1029752640. Its totient is φ = 134012928.

The previous prime is 421504207. The next prime is 421504217. The reversal of 421504212 is 212405124.

It is an interprime number because it is at equal distance from previous prime (421504207) and next prime (421504217).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421504217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21588 + ... + 36180.

It is an arithmetic number, because the mean of its divisors is an integer number (21453180).

Almost surely, 2^421504212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421504212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (514876320).

421504212 is an abundant number, since it is smaller than the sum of its proper divisors (608248428).

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

421504212 is a wasteful number, since it uses less digits than its factorization.

421504212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14712 (or 14710 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 421504212 is about 20530.5677466552. The cubic root of 421504212 is about 749.7802093735.

Adding to 421504212 its reverse (212405124), we get a palindrome (633909336).

The spelling of 421504212 in words is "four hundred twenty-one million, five hundred four thousand, two hundred twelve".