12320312 has 8 divisors (see below), whose sum is σ = 23100600. Its totient is φ = 6160152.

The previous prime is 12320309. The next prime is 12320339. The reversal of 12320312 is 21302321.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770012 + ... + 770027.

It is an arithmetic number, because the mean of its divisors is an integer number (2887575).

Almost surely, 2^12320312 is an apocalyptic number.

It is an amenable number.

12320312 is a deficient number, since it is larger than the sum of its proper divisors (10780288).

12320312 is a wasteful number, since it uses less digits than its factorization.

12320312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540045 (or 1540041 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 12320312 is about 3510.0301993003. The cubic root of 12320312 is about 230.9620197048.

Adding to 12320312 its reverse (21302321), we get a palindrome (33622633).

Subtracting 12320312 from its reverse (21302321), we obtain a square (8982009 = 2997²).

The spelling of 12320312 in words is "twelve million, three hundred twenty thousand, three hundred twelve".