2659621 has 2 divisors, whose sum is σ = 2659622. Its totient is φ = 2659620.

The previous prime is 2659607. The next prime is 2659627. The reversal of 2659621 is 1269562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1718721 + 940900 = 1311^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 2659621 - 2⁷ = 2659493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2659627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1329810 + 1329811.

It is an arithmetic number, because the mean of its divisors is an integer number (1329811).

2^2659621 is an apocalyptic number.

It is an amenable number.

2659621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2659621 is an equidigital number, since it uses as much as digits as its factorization.

2659621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 2659621 is about 1630.8344489862. The cubic root of 2659621 is about 138.5500173408.

The spelling of 2659621 in words is "two million, six hundred fifty-nine thousand, six hundred twenty-one".