165436 has 12 divisors (see below), whose sum is σ = 294840. Its totient is φ = 81200.

The previous prime is 165397. The next prime is 165437. The reversal of 165436 is 634561.

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

It is a self number, because there is not a number n which added to its sum of digits gives 165436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165437) 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, 115 + ... + 586.

It is an arithmetic number, because the mean of its divisors is an integer number (24570).

2¹⁶⁵⁴³⁶ is an apocalyptic number.

It is an amenable number.

165436 is a deficient number, since it is larger than the sum of its proper divisors (129404).

165436 is a wasteful number, since it uses less digits than its factorization.

165436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 762 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 165436 is about 406.7382450668. The cubic root of 165436 is about 54.8963336536.

Adding to 165436 its reverse (634561), we get a palindrome (799997).

The spelling of 165436 in words is "one hundred sixty-five thousand, four hundred thirty-six".