842120646 has 16 divisors (see below), whose sum is σ = 1685781504. Its totient is φ = 280450184.

The previous prime is 842120639. The next prime is 842120651. The reversal of 842120646 is 646021248.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57006 + ... + 70241.

It is an arithmetic number, because the mean of its divisors is an integer number (105361344).

Almost surely, 2^842120646 is an apocalyptic number.

842120646 is an abundant number, since it is smaller than the sum of its proper divisors (843660858).

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

842120646 is a wasteful number, since it uses less digits than its factorization.

842120646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128355.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 842120646 is about 29019.3150504970. The cubic root of 842120646 is about 944.3321414251.

The spelling of 842120646 in words is "eight hundred forty-two million, one hundred twenty thousand, six hundred forty-six".