12323540 has 24 divisors (see below), whose sum is σ = 26121480. Its totient is φ = 4883328.

The previous prime is 12323537. The next prime is 12323551. The reversal of 12323540 is 4532321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3632836 + 8690704 = 1906^2 + 2948^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647 + ... + 5006.

It is an arithmetic number, because the mean of its divisors is an integer number (1088395).

Almost surely, 2^12323540 is an apocalyptic number.

12323540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12323540 is an abundant number, since it is smaller than the sum of its proper divisors (13797940).

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

12323540 is a wasteful number, since it uses less digits than its factorization.

12323540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5771 (or 5769 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 12323540 is about 3510.4899942885. The cubic root of 12323540 is about 230.9821891154.

Adding to 12323540 its reverse (4532321), we get a palindrome (16855861).

The spelling of 12323540 in words is "twelve million, three hundred twenty-three thousand, five hundred forty".