168645 has 8 divisors (see below), whose sum is σ = 269856. Its totient is φ = 89936.

The previous prime is 168643. The next prime is 168673. The reversal of 168645 is 546861.

168645 is nontrivially palindromic in base 6.

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 168645 - 2¹ = 168643 is a prime.

It is a super-2 number, since 2×168645² = 56882272050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168643) 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, 5607 + ... + 5636.

It is an arithmetic number, because the mean of its divisors is an integer number (33732).

2¹⁶⁸⁶⁴⁵ is an apocalyptic number.

168645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

168645 is a deficient number, since it is larger than the sum of its proper divisors (101211).

168645 is a wasteful number, since it uses less digits than its factorization.

168645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11251.

The product of its digits is 5760, while the sum is 30.

The square root of 168645 is about 410.6640963123. The cubic root of 168645 is about 55.2490086703.

The spelling of 168645 in words is "one hundred sixty-eight thousand, six hundred forty-five".