165434 has 8 divisors (see below), whose sum is σ = 250068. Its totient is φ = 82080.

The previous prime is 165397. The next prime is 165437. The reversal of 165434 is 434561.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 162409 + 3025 = 403^2 + 55^2 .

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 (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, 134 + ... + 590.

2¹⁶⁵⁴³⁴ is an apocalyptic number.

165434 is a deficient number, since it is larger than the sum of its proper divisors (84634).

165434 is a wasteful number, since it uses less digits than its factorization.

165434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640.

The product of its digits is 1440, while the sum is 23.

The square root of 165434 is about 406.7357864757. The cubic root of 165434 is about 54.8961124339.

Adding to 165434 its reverse (434561), we get a palindrome (599995).

The spelling of 165434 in words is "one hundred sixty-five thousand, four hundred thirty-four".