3645503 has 4 divisors (see below), whose sum is σ = 3771240. Its totient is φ = 3519768.

The previous prime is 3645469. The next prime is 3645527. The reversal of 3645503 is 3055463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3055463 = 859 ⋅3557.

It is a cyclic number.

It is not a de Polignac number, because 3645503 - 2¹⁰ = 3644479 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62825 + ... + 62882.

It is an arithmetic number, because the mean of its divisors is an integer number (942810).

Almost surely, 2^3645503 is an apocalyptic number.

3645503 is a deficient number, since it is larger than the sum of its proper divisors (125737).

3645503 is a wasteful number, since it uses less digits than its factorization.

3645503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125736.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 3645503 is about 1909.3200360338. The cubic root of 3645503 is about 153.9049140350.

The spelling of 3645503 in words is "three million, six hundred forty-five thousand, five hundred three".