2443621 has 4 divisors (see below), whose sum is σ = 2447200. Its totient is φ = 2440044.

The previous prime is 2443619. The next prime is 2443643. The reversal of 2443621 is 1263442.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2443621 - 2¹ = 2443619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2443592 and 2443601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2443601) 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, 411 + ... + 2248.

It is an arithmetic number, because the mean of its divisors is an integer number (611800).

2^2443621 is an apocalyptic number.

It is an amenable number.

2443621 is a deficient number, since it is larger than the sum of its proper divisors (3579).

2443621 is an equidigital number, since it uses as much as digits as its factorization.

2443621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3578.

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

The square root of 2443621 is about 1563.2085593420. The cubic root of 2443621 is about 134.6928729130.

The spelling of 2443621 in words is "two million, four hundred forty-three thousand, six hundred twenty-one".