405124212 has 24 divisors (see below), whose sum is σ = 1000895616. Its totient is φ = 127097728.

The previous prime is 405124201. The next prime is 405124253. The reversal of 405124212 is 212421504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992748 + ... + 993155.

It is an arithmetic number, because the mean of its divisors is an integer number (41703984).

Almost surely, 2^405124212 is an apocalyptic number.

It is an amenable number.

405124212 is an abundant number, since it is smaller than the sum of its proper divisors (595771404).

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

405124212 is a wasteful number, since it uses less digits than its factorization.

405124212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985927 (or 1985925 counting only the distinct ones).

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

The square root of 405124212 is about 20127.6976328640. The cubic root of 405124212 is about 739.9392523788.

Adding to 405124212 its reverse (212421504), we get a palindrome (617545716).

The spelling of 405124212 in words is "four hundred five million, one hundred twenty-four thousand, two hundred twelve".