7912885 has 4 divisors (see below), whose sum is σ = 9495468. Its totient is φ = 6330304.

The previous prime is 7912867. The next prime is 7912889. The reversal of 7912885 is 5882197.

7912885 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5958481 + 1954404 = 2441^2 + 1398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7912885 is a prime.

It is a super-2 number, since 2×7912885² = 125227498046450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

7912885 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7912889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 791284 + ... + 791293.

It is an arithmetic number, because the mean of its divisors is an integer number (2373867).

Almost surely, 2^7912885 is an apocalyptic number.

It is an amenable number.

7912885 is a deficient number, since it is larger than the sum of its proper divisors (1582583).

7912885 is a wasteful number, since it uses less digits than its factorization.

7912885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582582.

The product of its digits is 40320, while the sum is 40.

The square root of 7912885 is about 2812.9850692814. The cubic root of 7912885 is about 199.2713905312.

The spelling of 7912885 in words is "seven million, nine hundred twelve thousand, eight hundred eighty-five".