4185645 has 16 divisors (see below), whose sum is σ = 6728832. Its totient is φ = 2221760.

The previous prime is 4185641. The next prime is 4185661. The reversal of 4185645 is 5465814.

It is not a de Polignac number, because 4185645 - 2² = 4185641 is a prime.

It is a super-3 number, since 3×4185645³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4185641) 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, 3415 + ... + 4475.

It is an arithmetic number, because the mean of its divisors is an integer number (420552).

Almost surely, 2^4185645 is an apocalyptic number.

It is an amenable number.

4185645 is a deficient number, since it is larger than the sum of its proper divisors (2543187).

4185645 is a wasteful number, since it uses less digits than its factorization.

4185645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332.

The product of its digits is 19200, while the sum is 33.

The square root of 4185645 is about 2045.8848941228. The cubic root of 4185645 is about 161.1588391646.

The spelling of 4185645 in words is "four million, one hundred eighty-five thousand, six hundred forty-five".