2421643 has 8 divisors (see below), whose sum is σ = 2777312. Its totient is φ = 2068416.

The previous prime is 2421641. The next prime is 2421649. The reversal of 2421643 is 3461242.

It is a happy number.

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

It is not a de Polignac number, because 2421643 - 2¹ = 2421641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2421641) 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, 2821 + ... + 3577.

It is an arithmetic number, because the mean of its divisors is an integer number (347164).

2^2421643 is an apocalyptic number.

2421643 is a deficient number, since it is larger than the sum of its proper divisors (355669).

2421643 is an equidigital number, since it uses as much as digits as its factorization.

2421643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221.

The product of its digits is 1152, while the sum is 22.

The square root of 2421643 is about 1556.1629092097. The cubic root of 2421643 is about 134.2878456300.

Adding to 2421643 its reverse (3461242), we get a palindrome (5882885).

The spelling of 2421643 in words is "two million, four hundred twenty-one thousand, six hundred forty-three".