165458 has 4 divisors (see below), whose sum is σ = 248190. Its totient is φ = 82728.

The previous prime is 165457. The next prime is 165463. The reversal of 165458 is 854561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 854561 = 101 ⋅8461.

It can be written as a sum of positive squares in only one way, i.e., 146689 + 18769 = 383^2 + 137^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165458.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 165458.

It is not an unprimeable number, because it can be changed into a prime (165457) by changing a digit.

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 as a sum of consecutive naturals, namely, 41363 + ... + 41366.

2¹⁶⁵⁴⁵⁸ is an apocalyptic number.

165458 is a deficient number, since it is larger than the sum of its proper divisors (82732).

165458 is an equidigital number, since it uses as much as digits as its factorization.

165458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82731.

The product of its digits is 4800, while the sum is 29.

The square root of 165458 is about 406.7652885879. The cubic root of 165458 is about 54.8987669527.

The spelling of 165458 in words is "one hundred sixty-five thousand, four hundred fifty-eight".