2487581 has 2 divisors, whose sum is σ = 2487582. Its totient is φ = 2487580.

The previous prime is 2487571. The next prime is 2487587. The reversal of 2487581 is 1857842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1585081 + 902500 = 1259^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 2487581 - 2⁶ = 2487517 is a prime.

It is a super-2 number, since 2×2487581² = 12376118463122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2487587) 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, 1243790 + 1243791.

It is an arithmetic number, because the mean of its divisors is an integer number (1243791).

2^2487581 is an apocalyptic number.

It is an amenable number.

2487581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2487581 is an equidigital number, since it uses as much as digits as its factorization.

2487581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17920, while the sum is 35.

The square root of 2487581 is about 1577.2067080760. The cubic root of 2487581 is about 135.4957719845.

The spelling of 2487581 in words is "two million, four hundred eighty-seven thousand, five hundred eighty-one".