7921902 has 16 divisors (see below), whose sum is σ = 15990480. Its totient is φ = 2616192.

The previous prime is 7921891. The next prime is 7921909. The reversal of 7921902 is 2091297.

It is a self number, because there is not a number n which added to its sum of digits gives 7921902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921909) by changing a digit.

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, 5403 + ... + 6710.

It is an arithmetic number, because the mean of its divisors is an integer number (999405).

Almost surely, 2^7921902 is an apocalyptic number.

7921902 is an abundant number, since it is smaller than the sum of its proper divisors (8068578).

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

7921902 is a wasteful number, since it uses less digits than its factorization.

7921902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12227.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 7921902 is about 2814.5873587437. The cubic root of 7921902 is about 199.3470539605.

The spelling of 7921902 in words is "seven million, nine hundred twenty-one thousand, nine hundred two".