165418 has 16 divisors (see below), whose sum is σ = 277056. Its totient is φ = 73440.

The previous prime is 165397. The next prime is 165437. The reversal of 165418 is 814561.

It is a super-2 number, since 2×165418² = 54726229448, which contains 22 as substring.

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 = 165392 and 165401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1555 + ... + 1657.

It is an arithmetic number, because the mean of its divisors is an integer number (17316).

2¹⁶⁵⁴¹⁸ is an apocalyptic number.

165418 is a deficient number, since it is larger than the sum of its proper divisors (111638).

165418 is a wasteful number, since it uses less digits than its factorization.

165418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189.

The product of its digits is 960, while the sum is 25.

The square root of 165418 is about 406.7161172120. The cubic root of 165418 is about 54.8943426121.

Adding to 165418 its reverse (814561), we get a palindrome (979979).

The spelling of 165418 in words is "one hundred sixty-five thousand, four hundred eighteen".