365645 has 16 divisors (see below), whose sum is σ = 519168. Its totient is φ = 241920.

The previous prime is 365641. The next prime is 365669. The reversal of 365645 is 546563.

It is not a de Polignac number, because 365645 - 2² = 365641 is a prime.

It is a super-3 number, since 3×365645³ = 146656113572133375, which contains 333 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 3⁷ + 6⁴ + 6⁷ + 5 + 4⁶ + 5⁷ .

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 365645.

It is not an unprimeable number, because it can be changed into a prime (365641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 917 + ... + 1253.

It is an arithmetic number, because the mean of its divisors is an integer number (32448).

2³⁶⁵⁶⁴⁵ is an apocalyptic number.

365645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

365645 is a deficient number, since it is larger than the sum of its proper divisors (153523).

365645 is a wasteful number, since it uses less digits than its factorization.

365645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380.

The product of its digits is 10800, while the sum is 29.

The square root of 365645 is about 604.6858688608. The cubic root of 365645 is about 71.5077664473.

The spelling of 365645 in words is "three hundred sixty-five thousand, six hundred forty-five".