4539645 has 40 divisors (see below), whose sum is σ = 8886240. Its totient is φ = 2198880.

The previous prime is 4539617. The next prime is 4539649. The reversal of 4539645 is 5469354.

It is a happy number.

4539645 is a `hidden beast` number, since 4 + 5 + 3 + 9 + 645 = 666.

It is not a de Polignac number, because 4539645 - 2⁶ = 4539581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4539649) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3946 + ... + 4964.

It is an arithmetic number, because the mean of its divisors is an integer number (222156).

Almost surely, 2^4539645 is an apocalyptic number.

4539645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4539645 is a deficient number, since it is larger than the sum of its proper divisors (4346595).

4539645 is a wasteful number, since it uses less digits than its factorization.

4539645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047 (or 1038 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 4539645 is about 2130.6442687600. The cubic root of 4539645 is about 165.5797785643.

It can be divided in two parts, 4539 and 645, that added together give a square (5184 = 72²).

The spelling of 4539645 in words is "four million, five hundred thirty-nine thousand, six hundred forty-five".