7875861 has 16 divisors (see below), whose sum is σ = 12633600. Its totient is φ = 4263408.

The previous prime is 7875841. The next prime is 7875869. The reversal of 7875861 is 1685787.

It is not a de Polignac number, because 7875861 - 2⁶ = 7875797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7875869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9471 + ... + 10268.

It is an arithmetic number, because the mean of its divisors is an integer number (789600).

Almost surely, 2^7875861 is an apocalyptic number.

It is an amenable number.

7875861 is a deficient number, since it is larger than the sum of its proper divisors (4757739).

7875861 is a wasteful number, since it uses less digits than its factorization.

7875861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19768.

The product of its digits is 94080, while the sum is 42.

The square root of 7875861 is about 2806.3964438404. The cubic root of 7875861 is about 198.9601108571.

The spelling of 7875861 in words is "seven million, eight hundred seventy-five thousand, eight hundred sixty-one".