12291473 has 4 divisors (see below), whose sum is σ = 12308148. Its totient is φ = 12274800.

The previous prime is 12291463. The next prime is 12291491. The reversal of 12291473 is 37419221.

12291473 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7219969 + 5071504 = 2687^2 + 2252^2 .

It is a cyclic number.

It is not a de Polignac number, because 12291473 - 2¹⁶ = 12225937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12291403) 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 3 ways as a sum of consecutive naturals, for example, 7178 + ... + 8723.

It is an arithmetic number, because the mean of its divisors is an integer number (3077037).

Almost surely, 2^12291473 is an apocalyptic number.

It is an amenable number.

12291473 is a deficient number, since it is larger than the sum of its proper divisors (16675).

12291473 is an equidigital number, since it uses as much as digits as its factorization.

12291473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16674.

The product of its digits is 3024, while the sum is 29.

The square root of 12291473 is about 3505.9197081508. The cubic root of 12291473 is about 230.7816693609.

The spelling of 12291473 in words is "twelve million, two hundred ninety-one thousand, four hundred seventy-three".