2445643 has 4 divisors (see below), whose sum is σ = 2452320. Its totient is φ = 2438968.

The previous prime is 2445629. The next prime is 2445647. The reversal of 2445643 is 3465442.

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 2445643 - 2¹³ = 2437451 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 (2445647) 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, 2755 + ... + 3532.

It is an arithmetic number, because the mean of its divisors is an integer number (613080).

2^2445643 is an apocalyptic number.

2445643 is a deficient number, since it is larger than the sum of its proper divisors (6677).

2445643 is an equidigital number, since it uses as much as digits as its factorization.

2445643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6676.

The product of its digits is 11520, while the sum is 28.

The square root of 2445643 is about 1563.8551723226. The cubic root of 2445643 is about 134.7300136840.

The spelling of 2445643 in words is "two million, four hundred forty-five thousand, six hundred forty-three".