2621443 has 4 divisors (see below), whose sum is σ = 2859768. Its totient is φ = 2383120.

The previous prime is 2621431. The next prime is 2621447. The reversal of 2621443 is 3441262.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2621443 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

2621443 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2621447) 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, 119146 + ... + 119167.

It is an arithmetic number, because the mean of its divisors is an integer number (714942).

2^2621443 is an apocalyptic number.

2621443 is a deficient number, since it is larger than the sum of its proper divisors (238325).

2621443 is a wasteful number, since it uses less digits than its factorization.

2621443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238324.

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

The square root of 2621443 is about 1619.0870884545. The cubic root of 2621443 is about 137.8838727605.

The spelling of 2621443 in words is "two million, six hundred twenty-one thousand, four hundred forty-three".