12705587 has 2 divisors, whose sum is σ = 12705588. Its totient is φ = 12705586.

The previous prime is 12705571. The next prime is 12705617. The reversal of 12705587 is 78550721.

It is a weak prime.

It is an emirp because it is prime and its reverse (78550721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12705587 - 2⁴ = 12705571 is a prime.

It is a super-5 number, since 5×12705587⁵ (a number of 37 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (12785587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6352793 + 6352794.

It is an arithmetic number, because the mean of its divisors is an integer number (6352794).

Almost surely, 2^12705587 is an apocalyptic number.

12705587 is a deficient number, since it is larger than the sum of its proper divisors (1).

12705587 is an equidigital number, since it uses as much as digits as its factorization.

12705587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 12705587 is about 3564.4897250518. The cubic root of 12705587 is about 233.3448631491.

The spelling of 12705587 in words is "twelve million, seven hundred five thousand, five hundred eighty-seven".