12320424 has 40 divisors (see below), whose sum is σ = 34510410. Its totient is φ = 4106592.

The previous prime is 12320411. The next prime is 12320431. The reversal of 12320424 is 42402321.

It can be written as a sum of positive squares in only one way, i.e., 12320100 + 324 = 3510^2 + 18^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12320397 and 12320406.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8859 + ... + 10154.

Almost surely, 2^12320424 is an apocalyptic number.

It is an amenable number.

12320424 is an abundant number, since it is smaller than the sum of its proper divisors (22189986).

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

12320424 is a wasteful number, since it uses less digits than its factorization.

12320424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19031 (or 19018 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 12320424 is about 3510.0461535427. The cubic root of 12320424 is about 230.9627195698.

Adding to 12320424 its reverse (42402321), we get a palindrome (54722745).

It can be divided in two parts, 123 and 20424, that multiplied together give a palindrome (2512152).

The spelling of 12320424 in words is "twelve million, three hundred twenty thousand, four hundred twenty-four".