7864165 has 8 divisors (see below), whose sum is σ = 9692280. Its totient is φ = 6121152.

The previous prime is 7864159. The next prime is 7864187. The reversal of 7864165 is 5614687.

It can be written as a sum of positive squares in 4 ways, for example, as 4322241 + 3541924 = 2079^2 + 1882^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7864165 - 2⁷ = 7864037 is a prime.

It is a super-2 number, since 2×7864165² = 123690182294450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

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, 21070 + ... + 21439.

It is an arithmetic number, because the mean of its divisors is an integer number (1211535).

Almost surely, 2^7864165 is an apocalyptic number.

It is an amenable number.

7864165 is a deficient number, since it is larger than the sum of its proper divisors (1828115).

7864165 is a wasteful number, since it uses less digits than its factorization.

7864165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42551.

The product of its digits is 40320, while the sum is 37.

The square root of 7864165 is about 2804.3118585493. The cubic root of 7864165 is about 198.8615738918.

The spelling of 7864165 in words is "seven million, eight hundred sixty-four thousand, one hundred sixty-five".