12321340 has 24 divisors (see below), whose sum is σ = 26242272. Its totient is φ = 4858560.

The previous prime is 12321319. The next prime is 12321341. The reversal of 12321340 is 4312321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321341) 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, 2919 + ... + 5758.

It is an arithmetic number, because the mean of its divisors is an integer number (1093428).

Almost surely, 2^12321340 is an apocalyptic number.

12321340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12321340 is an abundant number, since it is smaller than the sum of its proper divisors (13920932).

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

12321340 is a wasteful number, since it uses less digits than its factorization.

12321340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8757 (or 8755 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 12321340 is about 3510.1766337323. The cubic root of 12321340 is about 230.9684433071.

Adding to 12321340 its reverse (4312321), we get a palindrome (16633661).

The spelling of 12321340 in words is "twelve million, three hundred twenty-one thousand, three hundred forty".