165394 has 8 divisors (see below), whose sum is σ = 254268. Its totient is φ = 80640.

The previous prime is 165391. The next prime is 165397. The reversal of 165394 is 493561.

It is an interprime number because it is at equal distance from previous prime (165391) and next prime (165397).

It can be written as a sum of positive squares in 2 ways, for example, as 164025 + 1369 = 405^2 + 37^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165391) 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, 927 + ... + 1090.

2¹⁶⁵³⁹⁴ is an apocalyptic number.

165394 is a deficient number, since it is larger than the sum of its proper divisors (88874).

165394 is a wasteful number, since it uses less digits than its factorization.

165394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060.

The product of its digits is 3240, while the sum is 28.

The square root of 165394 is about 406.6866115328. The cubic root of 165394 is about 54.8916876653.

The spelling of 165394 in words is "one hundred sixty-five thousand, three hundred ninety-four".