2529581 has 2 divisors, whose sum is σ = 2529582. Its totient is φ = 2529580.

The previous prime is 2529557. The next prime is 2529589. The reversal of 2529581 is 1859252.

2529581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2418025 + 111556 = 1555^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 2529581 - 2¹⁰ = 2528557 is a prime.

It is a super-2 number, since 2×2529581² = 12797560071122, which contains 22 as substring.

It is a Sophie Germain 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 (2529589) 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, 1264790 + 1264791.

It is an arithmetic number, because the mean of its divisors is an integer number (1264791).

2^2529581 is an apocalyptic number.

It is an amenable number.

2529581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2529581 is an equidigital number, since it uses as much as digits as its factorization.

2529581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 32.

The square root of 2529581 is about 1590.4656550834. The cubic root of 2529581 is about 136.2540845506.

The spelling of 2529581 in words is "two million, five hundred twenty-nine thousand, five hundred eighty-one".