7901685 has 64 divisors (see below), whose sum is σ = 16277760. Its totient is φ = 3594240.

The previous prime is 7901671. The next prime is 7901713. The reversal of 7901685 is 5861097.

It is not a de Polignac number, because 7901685 - 2⁴ = 7901669 is a prime.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 25089 + ... + 25401.

It is an arithmetic number, because the mean of its divisors is an integer number (254340).

Almost surely, 2^7901685 is an apocalyptic number.

It is an amenable number.

7901685 is an abundant number, since it is smaller than the sum of its proper divisors (8376075).

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

7901685 is a wasteful number, since it uses less digits than its factorization.

7901685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 7901685 is about 2810.9935965776. The cubic root of 7901685 is about 199.1773290355.

Adding to 7901685 its sum of digits (36), we get a square (7901721 = 2811²).

The spelling of 7901685 in words is "seven million, nine hundred one thousand, six hundred eighty-five".