12154312 has 16 divisors (see below), whose sum is σ = 22936860. Its totient is φ = 6037824.

The previous prime is 12154291. The next prime is 12154313. The reversal of 12154312 is 21345121.

It can be written as a sum of positive squares in 2 ways, for example, as 12152196 + 2116 = 3486^2 + 46^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12154312.

It is not an unprimeable number, because it can be changed into a prime (12154313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3583 + ... + 6094.

Almost surely, 2^12154312 is an apocalyptic number.

It is an amenable number.

12154312 is a deficient number, since it is larger than the sum of its proper divisors (10782548).

12154312 is a wasteful number, since it uses less digits than its factorization.

12154312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9840 (or 9836 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 12154312 is about 3486.3034865026. The cubic root of 12154312 is about 229.9200226024.

Adding to 12154312 its reverse (21345121), we get a palindrome (33499433).

The spelling of 12154312 in words is "twelve million, one hundred fifty-four thousand, three hundred twelve".