3645705 has 16 divisors (see below), whose sum is σ = 6666624. Its totient is φ = 1666560.

The previous prime is 3645703. The next prime is 3645709. The reversal of 3645705 is 5075463.

It is not a de Polignac number, because 3645705 - 2¹ = 3645703 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3645703) 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, 17256 + ... + 17465.

It is an arithmetic number, because the mean of its divisors is an integer number (416664).

Almost surely, 2^3645705 is an apocalyptic number.

3645705 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3645705 is a deficient number, since it is larger than the sum of its proper divisors (3020919).

3645705 is a wasteful number, since it uses less digits than its factorization.

3645705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34736.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 3645705 is about 1909.3729337141. The cubic root of 3645705 is about 153.9077566439.

The spelling of 3645705 in words is "three million, six hundred forty-five thousand, seven hundred five".