12512591 has 18 divisors (see below), whose sum is σ = 15771672. Its totient is φ = 9893520.

The previous prime is 12512579. The next prime is 12512593. The reversal of 12512591 is 19521521.

It is not a de Polignac number, because 12512591 - 2¹⁰ = 12511567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12512591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12512593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7526 + ... + 9036.

It is an arithmetic number, because the mean of its divisors is an integer number (876204).

Almost surely, 2^12512591 is an apocalyptic number.

12512591 is a deficient number, since it is larger than the sum of its proper divisors (3259081).

12512591 is a wasteful number, since it uses less digits than its factorization.

12512591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551 (or 1531 counting only the distinct ones).

The product of its digits is 900, while the sum is 26.

The square root of 12512591 is about 3537.3140940550. The cubic root of 12512591 is about 232.1573385252.

The spelling of 12512591 in words is "twelve million, five hundred twelve thousand, five hundred ninety-one".