3645745 has 8 divisors (see below), whose sum is σ = 4420584. Its totient is φ = 2886144.

The previous prime is 3645737. The next prime is 3645749. The reversal of 3645745 is 5475463.

It is a happy number.

3645745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1034289 + 2611456 = 1017^2 + 1616^2 .

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 3645745 - 2³ = 3645737 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3645745.

It is not an unprimeable number, because it can be changed into a prime (3645749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3274 + ... + 4243.

It is an arithmetic number, because the mean of its divisors is an integer number (552573).

Almost surely, 2^3645745 is an apocalyptic number.

It is an amenable number.

3645745 is a deficient number, since it is larger than the sum of its proper divisors (774839).

3645745 is an equidigital number, since it uses as much as digits as its factorization.

3645745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7619.

The product of its digits is 50400, while the sum is 34.

The square root of 3645745 is about 1909.3834083285. The cubic root of 3645745 is about 153.9083195243.

The spelling of 3645745 in words is "three million, six hundred forty-five thousand, seven hundred forty-five".