12506291 has 4 divisors (see below), whose sum is σ = 14292912. Its totient is φ = 10719672.

The previous prime is 12506269. The next prime is 12506303. The reversal of 12506291 is 19260521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12506291 - 2¹⁰ = 12505267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12506291.

It is not an unprimeable number, because it can be changed into a prime (12506491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 893300 + ... + 893313.

It is an arithmetic number, because the mean of its divisors is an integer number (3573228).

Almost surely, 2^12506291 is an apocalyptic number.

12506291 is a deficient number, since it is larger than the sum of its proper divisors (1786621).

12506291 is an equidigital number, since it uses as much as digits as its factorization.

12506291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786620.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 12506291 is about 3536.4234757732. The cubic root of 12506291 is about 232.1183687981.

The spelling of 12506291 in words is "twelve million, five hundred six thousand, two hundred ninety-one".