212412420 has 72 divisors (see below), whose sum is σ = 702898560. Its totient is φ = 51493440.

The previous prime is 212412413. The next prime is 212412451. The reversal of 212412420 is 24214212.

212412420 is a `hidden beast` number, since 2 + 1 + 241 + 2 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212412393 and 212412402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51660 + ... + 55619.

It is an arithmetic number, because the mean of its divisors is an integer number (9762480).

Almost surely, 2^212412420 is an apocalyptic number.

212412420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212412420 is an abundant number, since it is smaller than the sum of its proper divisors (490486140).

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

212412420 is a wasteful number, since it uses less digits than its factorization.

212412420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107305 (or 107300 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 212412420 is about 14574.3754583172. The cubic root of 212412420 is about 596.6596041041.

Adding to 212412420 its reverse (24214212), we get a palindrome (236626632).

The spelling of 212412420 in words is "two hundred twelve million, four hundred twelve thousand, four hundred twenty".