12587691 has 8 divisors (see below), whose sum is σ = 17174080. Its totient is φ = 8196552.

The previous prime is 12587689. The next prime is 12587699. The reversal of 12587691 is 19678521.

12587691 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12587691 - 2¹ = 12587689 is a prime.

It is a super-2 number, since 2×12587691² = 316899929422962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12587699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48661 + ... + 48918.

It is an arithmetic number, because the mean of its divisors is an integer number (2146760).

Almost surely, 2^12587691 is an apocalyptic number.

12587691 is a deficient number, since it is larger than the sum of its proper divisors (4586389).

12587691 is an equidigital number, since it uses as much as digits as its factorization.

12587691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97625.

The product of its digits is 30240, while the sum is 39.

The square root of 12587691 is about 3547.9136122516. The cubic root of 12587691 is about 232.6208782929.

The spelling of 12587691 in words is "twelve million, five hundred eighty-seven thousand, six hundred ninety-one".