2845643 has 4 divisors (see below), whose sum is σ = 2851608. Its totient is φ = 2839680.

The previous prime is 2845639. The next prime is 2845657. The reversal of 2845643 is 3465482.

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

It is a cyclic number.

It is not a de Polignac number, because 2845643 - 2² = 2845639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2845603) 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, 2198 + ... + 3243.

It is an arithmetic number, because the mean of its divisors is an integer number (712902).

2^2845643 is an apocalyptic number.

2845643 is a deficient number, since it is larger than the sum of its proper divisors (5965).

2845643 is an equidigital number, since it uses as much as digits as its factorization.

2845643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5964.

The product of its digits is 23040, while the sum is 32.

The square root of 2845643 is about 1686.9033760118. The cubic root of 2845643 is about 141.7077072944.

The spelling of 2845643 in words is "two million, eight hundred forty-five thousand, six hundred forty-three".