165974 has 8 divisors (see below), whose sum is σ = 257088. Its totient is φ = 80280.

The previous prime is 165961. The next prime is 165983. The reversal of 165974 is 479561.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 165974.

It is a congruent number.

It is an unprimeable number.

165974 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277 + ... + 1400.

It is an arithmetic number, because the mean of its divisors is an integer number (32136).

2¹⁶⁵⁹⁷⁴ is an apocalyptic number.

165974 is a deficient number, since it is larger than the sum of its proper divisors (91114).

165974 is a wasteful number, since it uses less digits than its factorization.

165974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710.

The product of its digits is 7560, while the sum is 32.

The square root of 165974 is about 407.3990672547. The cubic root of 165974 is about 54.9557771242.

The spelling of 165974 in words is "one hundred sixty-five thousand, nine hundred seventy-four".