2621243 has 4 divisors (see below), whose sum is σ = 2625408. Its totient is φ = 2617080.

The previous prime is 2621239. The next prime is 2621257. The reversal of 2621243 is 3421262.

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 2621243 - 2² = 2621239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2621263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923 + ... + 2468.

It is an arithmetic number, because the mean of its divisors is an integer number (656352).

2^2621243 is an apocalyptic number.

2621243 is a deficient number, since it is larger than the sum of its proper divisors (4165).

2621243 is an equidigital number, since it uses as much as digits as its factorization.

2621243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4164.

The product of its digits is 576, while the sum is 20.

The square root of 2621243 is about 1619.0253240762. The cubic root of 2621243 is about 137.8803661071.

The spelling of 2621243 in words is "two million, six hundred twenty-one thousand, two hundred forty-three".