2405643 has 8 divisors (see below), whose sum is σ = 3214848. Its totient is φ = 1600104.

The previous prime is 2405633. The next prime is 2405651. The reversal of 2405643 is 3465042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2405643 - 2⁸ = 2405387 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (2405633) 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, 1630 + ... + 2732.

It is an arithmetic number, because the mean of its divisors is an integer number (401856).

2^2405643 is an apocalyptic number.

2405643 is a deficient number, since it is larger than the sum of its proper divisors (809205).

2405643 is a wasteful number, since it uses less digits than its factorization.

2405643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 2405643 is about 1551.0135395927. The cubic root of 2405643 is about 133.9914414969.

The spelling of 2405643 in words is "two million, four hundred five thousand, six hundred forty-three".