12581587 has 2 divisors, whose sum is σ = 12581588. Its totient is φ = 12581586.

The previous prime is 12581557. The next prime is 12581599. The reversal of 12581587 is 78518521.

It is a strong prime.

It is an emirp because it is prime and its reverse (78518521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12581587 is a prime.

It is not a weakly prime, because it can be changed into another prime (12581537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6290793 + 6290794.

It is an arithmetic number, because the mean of its divisors is an integer number (6290794).

Almost surely, 2^12581587 is an apocalyptic number.

12581587 is a deficient number, since it is larger than the sum of its proper divisors (1).

12581587 is an equidigital number, since it uses as much as digits as its factorization.

12581587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 37.

The square root of 12581587 is about 3547.0532840655. The cubic root of 12581587 is about 232.5832715172.

The spelling of 12581587 in words is "twelve million, five hundred eighty-one thousand, five hundred eighty-seven".