2508521 has 2 divisors, whose sum is σ = 2508522. Its totient is φ = 2508520.

The previous prime is 2508511. The next prime is 2508557. The reversal of 2508521 is 1258052.

2508521 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., 1860496 + 648025 = 1364^2 + 805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2508521 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 (2508511) 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, 1254260 + 1254261.

It is an arithmetic number, because the mean of its divisors is an integer number (1254261).

2^2508521 is an apocalyptic number.

It is an amenable number.

2508521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2508521 is an equidigital number, since it uses as much as digits as its factorization.

2508521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2508521 is about 1583.8311147341. The cubic root of 2508521 is about 135.8749029891.

The spelling of 2508521 in words is "two million, five hundred eight thousand, five hundred twenty-one".