2590921 has 2 divisors, whose sum is σ = 2590922. Its totient is φ = 2590920.

The previous prime is 2590909. The next prime is 2590937. The reversal of 2590921 is 1290952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1849600 + 741321 = 1360^2 + 861^2 .

It is a cyclic number.

It is not a de Polignac number, because 2590921 - 2¹³ = 2582729 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2590921.

It is not a weakly prime, because it can be changed into another prime (2591921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1295460 + 1295461.

It is an arithmetic number, because the mean of its divisors is an integer number (1295461).

2^2590921 is an apocalyptic number.

It is an amenable number.

2590921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2590921 is an equidigital number, since it uses as much as digits as its factorization.

2590921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 2590921 is about 1609.6338092871. The cubic root of 2590921 is about 137.3466455555.

The spelling of 2590921 in words is "two million, five hundred ninety thousand, nine hundred twenty-one".