12320072 has 8 divisors (see below), whose sum is σ = 23100150. Its totient is φ = 6160032.

The previous prime is 12320071. The next prime is 12320083. The reversal of 12320072 is 27002321.

It can be written as a sum of positive squares in only one way, i.e., 12013156 + 306916 = 3466^2 + 554^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 12320072.

It is not an unprimeable number, because it can be changed into a prime (12320071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769997 + ... + 770012.

Almost surely, 2^12320072 is an apocalyptic number.

It is an amenable number.

12320072 is a deficient number, since it is larger than the sum of its proper divisors (10780078).

12320072 is a wasteful number, since it uses less digits than its factorization.

12320072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540015 (or 1540011 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 12320072 is about 3509.9960113937. The cubic root of 12320072 is about 230.9605199796.

Adding to 12320072 its reverse (27002321), we get a palindrome (39322393).

The spelling of 12320072 in words is "twelve million, three hundred twenty thousand, seventy-two".