840712 has 16 divisors (see below), whose sum is σ = 1659600. Its totient is φ = 398160.

The previous prime is 840709. The next prime is 840713. The reversal of 840712 is 217048.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840712.

It is not an unprimeable number, because it can be changed into a prime (840713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2614 + ... + 2917.

It is an arithmetic number, because the mean of its divisors is an integer number (103725).

2⁸⁴⁰⁷¹² is an apocalyptic number.

It is an amenable number.

840712 is a deficient number, since it is larger than the sum of its proper divisors (818888).

840712 is a wasteful number, since it uses less digits than its factorization.

840712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5556 (or 5552 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 840712 is about 916.9034845609. The cubic root of 840712 is about 94.3805307929.

The spelling of 840712 in words is "eight hundred forty thousand, seven hundred twelve".