12247291 has 8 divisors (see below), whose sum is σ = 14174720. Its totient is φ = 10364328.

The previous prime is 12247289. The next prime is 12247297. The reversal of 12247291 is 19274221.

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

It is a cyclic number.

It is not a de Polignac number, because 12247291 - 2¹ = 12247289 is a prime.

It is a super-2 number, since 2×12247291² = 299992273677362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12247297) 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, 10521 + ... + 11626.

It is an arithmetic number, because the mean of its divisors is an integer number (1771840).

Almost surely, 2^12247291 is an apocalyptic number.

12247291 is a deficient number, since it is larger than the sum of its proper divisors (1927429).

12247291 is an equidigital number, since it uses as much as digits as its factorization.

12247291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22233.

The product of its digits is 2016, while the sum is 28.

The square root of 12247291 is about 3499.6129786021. The cubic root of 12247291 is about 230.5048205993.

It can be divided in two parts, 1224 and 7291, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 12247291 in words is "twelve million, two hundred forty-seven thousand, two hundred ninety-one".