165430 has 16 divisors (see below), whose sum is σ = 303264. Its totient is φ = 64960.

The previous prime is 165397. The next prime is 165437. The reversal of 165430 is 34561.

It is an Ulam number.

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

It is a junction number, because it is equal to n+sod(n) for n = 165398 and 165407.

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 7 ways as a sum of consecutive naturals, for example, 594 + ... + 826.

It is an arithmetic number, because the mean of its divisors is an integer number (18954).

2¹⁶⁵⁴³⁰ is an apocalyptic number.

165430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165430 is a deficient number, since it is larger than the sum of its proper divisors (137834).

165430 is a wasteful number, since it uses less digits than its factorization.

165430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 165430 is about 406.7308692489. The cubic root of 165430 is about 54.8956699892.

Adding to 165430 its reverse (34561), we get a palindrome (199991).

It can be divided in two parts, 165 and 430, that added together give a palindrome (595).

The spelling of 165430 in words is "one hundred sixty-five thousand, four hundred thirty".