12291223 has 8 divisors (see below), whose sum is σ = 14658048. Its totient is φ = 10077144.

The previous prime is 12291211. The next prime is 12291259. The reversal of 12291223 is 32219221.

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

It is a de Polignac number, because none of the positive numbers 2^k-12291223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12291194 and 12291203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12291623) 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, 38011 + ... + 38332.

It is an arithmetic number, because the mean of its divisors is an integer number (1832256).

Almost surely, 2^12291223 is an apocalyptic number.

12291223 is a deficient number, since it is larger than the sum of its proper divisors (2366825).

12291223 is an equidigital number, since it uses as much as digits as its factorization.

12291223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76373.

The product of its digits is 432, while the sum is 22.

The square root of 12291223 is about 3505.8840539870. The cubic root of 12291223 is about 230.7801047041.

The spelling of 12291223 in words is "twelve million, two hundred ninety-one thousand, two hundred twenty-three".