2552621 has 2 divisors, whose sum is σ = 2552622. Its totient is φ = 2552620.

The previous prime is 2552611. The next prime is 2552623. The reversal of 2552621 is 1262552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2175625 + 376996 = 1475^2 + 614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2552621 is a prime.

Together with 2552623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2552623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276310 + 1276311.

It is an arithmetic number, because the mean of its divisors is an integer number (1276311).

2^2552621 is an apocalyptic number.

It is an amenable number.

2552621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2552621 is an equidigital number, since it uses as much as digits as its factorization.

2552621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 23.

The square root of 2552621 is about 1597.6923984297. The cubic root of 2552621 is about 136.6665126576. Note that the first 3 decimals are identical.

The spelling of 2552621 in words is "two million, five hundred fifty-two thousand, six hundred twenty-one".