2621263 has 2 divisors, whose sum is σ = 2621264. Its totient is φ = 2621262.

The previous prime is 2621257. The next prime is 2621279. The reversal of 2621263 is 3621262.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2621263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2621063) 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 as a sum of consecutive naturals, namely, 1310631 + 1310632.

It is an arithmetic number, because the mean of its divisors is an integer number (1310632).

2^2621263 is an apocalyptic number.

2621263 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621263 is an equidigital number, since it uses as much as digits as its factorization.

2621263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 22.

The square root of 2621263 is about 1619.0315006200. The cubic root of 2621263 is about 137.8807167805.

Subtracting 2621263 from its reverse (3621262), we obtain a palindrome (999999).

The spelling of 2621263 in words is "two million, six hundred twenty-one thousand, two hundred sixty-three".