12491223 has 4 divisors (see below), whose sum is σ = 16654968. Its totient is φ = 8327480.

The previous prime is 12491201. The next prime is 12491273. The reversal of 12491223 is 32219421.

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 12491223 - 2⁵ = 12491191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12491193 and 12491202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12491273) 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, 2081868 + ... + 2081873.

It is an arithmetic number, because the mean of its divisors is an integer number (4163742).

Almost surely, 2^12491223 is an apocalyptic number.

12491223 is a deficient number, since it is larger than the sum of its proper divisors (4163745).

12491223 is an equidigital number, since it uses as much as digits as its factorization.

12491223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163744.

The product of its digits is 864, while the sum is 24.

The square root of 12491223 is about 3534.2924327226. The cubic root of 12491223 is about 232.0251099952.

The spelling of 12491223 in words is "twelve million, four hundred ninety-one thousand, two hundred twenty-three".