12291009 has 8 divisors (see below), whose sum is σ = 16415520. Its totient is φ = 8180256.

The previous prime is 12291007. The next prime is 12291011. The reversal of 12291009 is 90019221.

It is an interprime number because it is at equal distance from previous prime (12291007) and next prime (12291011).

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

It is not a de Polignac number, because 12291009 - 2¹ = 12291007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12291009.

It is not an unprimeable number, because it can be changed into a prime (12291001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1132 + ... + 5085.

It is an arithmetic number, because the mean of its divisors is an integer number (2051940).

Almost surely, 2^12291009 is an apocalyptic number.

It is an amenable number.

12291009 is a deficient number, since it is larger than the sum of its proper divisors (4124511).

12291009 is an equidigital number, since it uses as much as digits as its factorization.

12291009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6879.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 12291009 is about 3505.8535337347. The cubic root of 12291009 is about 230.7787653411.

The spelling of 12291009 in words is "twelve million, two hundred ninety-one thousand, nine".