165742 has 8 divisors (see below), whose sum is σ = 252000. Its totient is φ = 81744.

The previous prime is 165721. The next prime is 165749. The reversal of 165742 is 247561.

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

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165749) by changing a digit.

165742 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367 + ... + 682.

It is an arithmetic number, because the mean of its divisors is an integer number (31500).

2¹⁶⁵⁷⁴² is an apocalyptic number.

165742 is a deficient number, since it is larger than the sum of its proper divisors (86258).

165742 is a wasteful number, since it uses less digits than its factorization.

165742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130.

The product of its digits is 1680, while the sum is 25.

The square root of 165742 is about 407.1142345829. The cubic root of 165742 is about 54.9301592855.

The spelling of 165742 in words is "one hundred sixty-five thousand, seven hundred forty-two".