2620243 has 4 divisors (see below), whose sum is σ = 2646288. Its totient is φ = 2594200.

The previous prime is 2620231. The next prime is 2620253. The reversal of 2620243 is 3420262.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3420262 = 2 ⋅1710131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2620243 is a prime.

It is a Duffinian number.

2620243 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2620243.

It is not an unprimeable number, because it can be changed into a prime (2620223) 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, 12871 + ... + 13072.

It is an arithmetic number, because the mean of its divisors is an integer number (661572).

2^2620243 is an apocalyptic number.

2620243 is a deficient number, since it is larger than the sum of its proper divisors (26045).

2620243 is a wasteful number, since it uses less digits than its factorization.

2620243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26044.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 2620243 is about 1618.7164668341. The cubic root of 2620243 is about 137.8628301641.

Adding to 2620243 its sum of digits (19), we get a palindrome (2620262).

The spelling of 2620243 in words is "two million, six hundred twenty thousand, two hundred forty-three".