2642621 has 2 divisors, whose sum is σ = 2642622. Its totient is φ = 2642620.

The previous prime is 2642609. The next prime is 2642639. The reversal of 2642621 is 1262462.

2642621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2544025 + 98596 = 1595^2 + 314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2642621 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2642821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321310 + 1321311.

It is an arithmetic number, because the mean of its divisors is an integer number (1321311).

2^2642621 is an apocalyptic number.

It is an amenable number.

2642621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2642621 is an equidigital number, since it uses as much as digits as its factorization.

2642621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 23.

The square root of 2642621 is about 1625.6140378331. The cubic root of 2642621 is about 138.2541873998.

The spelling of 2642621 in words is "two million, six hundred forty-two thousand, six hundred twenty-one".