421212512 has 24 divisors (see below), whose sum is σ = 947728656. Its totient is φ = 180519552.

The previous prime is 421212511. The next prime is 421212523. The reversal of 421212512 is 215212124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421212511) 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, 939983 + ... + 940430.

It is an arithmetic number, because the mean of its divisors is an integer number (39488694).

Almost surely, 2^421212512 is an apocalyptic number.

It is an amenable number.

421212512 is an abundant number, since it is smaller than the sum of its proper divisors (526516144).

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

421212512 is a wasteful number, since it uses less digits than its factorization.

421212512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880430 (or 1880422 counting only the distinct ones).

The product of its digits is 320, while the sum is 20.

The square root of 421212512 is about 20523.4624759079. The cubic root of 421212512 is about 749.6072088412.

Adding to 421212512 its reverse (215212124), we get a palindrome (636424636).

The spelling of 421212512 in words is "four hundred twenty-one million, two hundred twelve thousand, five hundred twelve".