12151312 has 10 divisors (see below), whose sum is σ = 23543198. Its totient is φ = 6075648.

The previous prime is 12151297. The next prime is 12151343. The reversal of 12151312 is 21315121.

It can be written as a sum of positive squares in only one way, i.e., 10471696 + 1679616 = 3236^2 + 1296^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 759457 = 12151312 / (1 + 2 + 1 + 5 + 1 + 3 + 1 + 2).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 379713 + ... + 379744.

Almost surely, 2^12151312 is an apocalyptic number.

It is an amenable number.

12151312 is a deficient number, since it is larger than the sum of its proper divisors (11391886).

12151312 is an equidigital number, since it uses as much as digits as its factorization.

12151312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759465 (or 759459 counting only the distinct ones).

The product of its digits is 60, while the sum is 16.

The square root of 12151312 is about 3485.8732048082. The cubic root of 12151312 is about 229.9011043007.

Adding to 12151312 its reverse (21315121), we get a palindrome (33466433).

The spelling of 12151312 in words is "twelve million, one hundred fifty-one thousand, three hundred twelve".