861215412 has 48 divisors (see below), whose sum is σ = 2025024512. Its totient is φ = 284865120.

The previous prime is 861215401. The next prime is 861215429. The reversal of 861215412 is 214512168.

861215412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 861215412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1245987 + ... + 1246677.

Almost surely, 2^861215412 is an apocalyptic number.

It is an amenable number.

861215412 is an abundant number, since it is smaller than the sum of its proper divisors (1163809100).

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

861215412 is a wasteful number, since it uses less digits than its factorization.

861215412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348 (or 1346 counting only the distinct ones).

The product of its digits is 3840, while the sum is 30.

The square root of 861215412 is about 29346.4718833457. The cubic root of 861215412 is about 951.4163221234.

The spelling of 861215412 in words is "eight hundred sixty-one million, two hundred fifteen thousand, four hundred twelve".