164381 has 8 divisors (see below), whose sum is σ = 196224. Its totient is φ = 134640.

The previous prime is 164377. The next prime is 164387. The reversal of 164381 is 183461.

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

It is a cyclic number.

It is not a de Polignac number, because 164381 - 2² = 164377 is a prime.

It is a super-2 number, since 2×164381² = 54042226322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164387) by changing a digit.

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, 350 + ... + 671.

It is an arithmetic number, because the mean of its divisors is an integer number (24528).

2¹⁶⁴³⁸¹ is an apocalyptic number.

It is an amenable number.

164381 is a deficient number, since it is larger than the sum of its proper divisors (31843).

164381 is a wasteful number, since it uses less digits than its factorization.

164381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051.

The product of its digits is 576, while the sum is 23.

The square root of 164381 is about 405.4392679551. The cubic root of 164381 is about 54.7793917928.

It can be divided in two parts, 164 and 381, that added together give a palindrome (545).

The spelling of 164381 in words is "one hundred sixty-four thousand, three hundred eighty-one".