12321456 has 40 divisors (see below), whose sum is σ = 36378624. Its totient is φ = 3520320.

The previous prime is 12321437. The next prime is 12321461. The reversal of 12321456 is 65412321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18000 + ... + 18671.

Almost surely, 2^12321456 is an apocalyptic number.

12321456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12321456 is an abundant number, since it is smaller than the sum of its proper divisors (24057168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12321456 is a wasteful number, since it uses less digits than its factorization.

12321456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36689 (or 36683 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 12321456 is about 3510.1931570784. The cubic root of 12321456 is about 230.9691681269.

Adding to 12321456 its reverse (65412321), we get a palindrome (77733777).

The spelling of 12321456 in words is "twelve million, three hundred twenty-one thousand, four hundred fifty-six".