3645513 has 8 divisors (see below), whose sum is σ = 5400800. Its totient is φ = 2430324.

The previous prime is 3645469. The next prime is 3645527. The reversal of 3645513 is 3155463.

3645513 is a `hidden beast` number, since 3 + 645 + 5 + 13 = 666.

It is not a de Polignac number, because 3645513 - 2⁶ = 3645449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 135019 = 3645513 / (3 + 6 + 4 + 5 + 5 + 1 + 3).

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3645533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67483 + ... + 67536.

It is an arithmetic number, because the mean of its divisors is an integer number (675100).

Almost surely, 2^3645513 is an apocalyptic number.

It is an amenable number.

3645513 is a deficient number, since it is larger than the sum of its proper divisors (1755287).

3645513 is a wasteful number, since it uses less digits than its factorization.

3645513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135028 (or 135022 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 3645513 is about 1909.3226547653. The cubic root of 3645513 is about 153.9050547607.

The spelling of 3645513 in words is "three million, six hundred forty-five thousand, five hundred thirteen".