12321426 has 32 divisors (see below), whose sum is σ = 27111168. Its totient is φ = 3709440.

The previous prime is 12321409. The next prime is 12321431. The reversal of 12321426 is 62412321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1986 + ... + 5346.

It is an arithmetic number, because the mean of its divisors is an integer number (847224).

Almost surely, 2^12321426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12321426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13555584).

12321426 is an abundant number, since it is smaller than the sum of its proper divisors (14789742).

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

12321426 is a wasteful number, since it uses less digits than its factorization.

12321426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426.

The product of its digits is 576, while the sum is 21.

The square root of 12321426 is about 3510.1888838067. The cubic root of 12321426 is about 230.9689806739.

Adding to 12321426 its reverse (62412321), we get a palindrome (74733747).

The spelling of 12321426 in words is "twelve million, three hundred twenty-one thousand, four hundred twenty-six".