165290 has 8 divisors (see below), whose sum is σ = 297540. Its totient is φ = 66112.

The previous prime is 165287. The next prime is 165293. The reversal of 165290 is 92561.

It is an interprime number because it is at equal distance from previous prime (165287) and next prime (165293).

It can be written as a sum of positive squares in 2 ways, for example, as 160801 + 4489 = 401^2 + 67^2 .

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

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 (165293) 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, 8255 + ... + 8274.

2¹⁶⁵²⁹⁰ is an apocalyptic number.

165290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165290 is a deficient number, since it is larger than the sum of its proper divisors (132250).

165290 is a wasteful number, since it uses less digits than its factorization.

165290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16536.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 165290 is about 406.5587288449. The cubic root of 165290 is about 54.8801799273.

The spelling of 165290 in words is "one hundred sixty-five thousand, two hundred ninety".