165874 has 8 divisors (see below), whose sum is σ = 250668. Its totient is φ = 82320.

The previous prime is 165857. The next prime is 165877. The reversal of 165874 is 478561.

It can be written as a sum of positive squares in 2 ways, for example, as 165649 + 225 = 407^2 + 15^2 .

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

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (165877) 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, 184 + ... + 604.

165874 is a Friedman number, since it can be written as 8*((7+5)^4-1)-6, using all its digits and the basic arithmetic operations.

2¹⁶⁵⁸⁷⁴ is an apocalyptic number.

165874 is a deficient number, since it is larger than the sum of its proper divisors (84794).

165874 is a wasteful number, since it uses less digits than its factorization.

165874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620.

The product of its digits is 6720, while the sum is 31.

The square root of 165874 is about 407.2763189777. The cubic root of 165874 is about 54.9447378815.

The spelling of 165874 in words is "one hundred sixty-five thousand, eight hundred seventy-four".