2530681 has 2 divisors, whose sum is σ = 2530682. Its totient is φ = 2530680.

The previous prime is 2530669. The next prime is 2530699. The reversal of 2530681 is 1860352.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2005056 + 525625 = 1416^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 2530681 - 2¹⁹ = 2006393 is a prime.

It is a super-2 number, since 2×2530681² = 12808692647522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2530981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265340 + 1265341.

It is an arithmetic number, because the mean of its divisors is an integer number (1265341).

2^2530681 is an apocalyptic number.

It is an amenable number.

2530681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2530681 is an equidigital number, since it uses as much as digits as its factorization.

2530681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2530681 is about 1590.8114281712. The cubic root of 2530681 is about 136.2738319281.

The spelling of 2530681 in words is "two million, five hundred thirty thousand, six hundred eighty-one".