3645043 has 4 divisors (see below), whose sum is σ = 3658480. Its totient is φ = 3631608.

The previous prime is 3645013. The next prime is 3645049. The reversal of 3645043 is 3405463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3645043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3644999 and 3645017.

It is not an unprimeable number, because it can be changed into a prime (3645049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6303 + ... + 6856.

It is an arithmetic number, because the mean of its divisors is an integer number (914620).

Almost surely, 2^3645043 is an apocalyptic number.

3645043 is a deficient number, since it is larger than the sum of its proper divisors (13437).

3645043 is a wasteful number, since it uses less digits than its factorization.

3645043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13436.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 3645043 is about 1909.1995705007. The cubic root of 3645043 is about 153.8984403752.

The spelling of 3645043 in words is "three million, six hundred forty-five thousand, forty-three".