2621239 has 2 divisors, whose sum is σ = 2621240. Its totient is φ = 2621238.

The previous prime is 2621219. The next prime is 2621257. The reversal of 2621239 is 9321262.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2621239 - 2⁵ = 2621207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2621219) 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, 1310619 + 1310620.

It is an arithmetic number, because the mean of its divisors is an integer number (1310620).

2^2621239 is an apocalyptic number.

2621239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621239 is an equidigital number, since it uses as much as digits as its factorization.

2621239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 2621239 is about 1619.0240887646. The cubic root of 2621239 is about 137.8802959723.

The spelling of 2621239 in words is "two million, six hundred twenty-one thousand, two hundred thirty-nine".