2528621 has 2 divisors, whose sum is σ = 2528622. Its totient is φ = 2528620.

The previous prime is 2528599. The next prime is 2528627. The reversal of 2528621 is 1268252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2515396 + 13225 = 1586^2 + 115^2 .

It is a cyclic number.

It is not a de Polignac number, because 2528621 - 2⁶ = 2528557 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 (2528627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1264310 + 1264311.

It is an arithmetic number, because the mean of its divisors is an integer number (1264311).

2^2528621 is an apocalyptic number.

It is an amenable number.

2528621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2528621 is an equidigital number, since it uses as much as digits as its factorization.

2528621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 26.

The square root of 2528621 is about 1590.1638280379. The cubic root of 2528621 is about 136.2368457968.

The spelling of 2528621 in words is "two million, five hundred twenty-eight thousand, six hundred twenty-one".