12320156 has 6 divisors (see below), whose sum is σ = 21560280. Its totient is φ = 6160076.

The previous prime is 12320141. The next prime is 12320159. The reversal of 12320156 is 65102321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1540016 + ... + 1540023.

It is an arithmetic number, because the mean of its divisors is an integer number (3593380).

Almost surely, 2^12320156 is an apocalyptic number.

It is an amenable number.

12320156 is a deficient number, since it is larger than the sum of its proper divisors (9240124).

12320156 is a wasteful number, since it uses less digits than its factorization.

12320156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080043 (or 3080041 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 12320156 is about 3510.0079771989. The cubic root of 12320156 is about 230.9610448857.

Adding to 12320156 its reverse (65102321), we get a palindrome (77422477).

The spelling of 12320156 in words is "twelve million, three hundred twenty thousand, one hundred fifty-six".