12045312 has 66 divisors (see below), whose sum is σ = 34807188. Its totient is φ = 4012032.

The previous prime is 12045277. The next prime is 12045317. The reversal of 12045312 is 21354021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12045317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8563 + ... + 9869.

Almost surely, 2^12045312 is an apocalyptic number.

12045312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12045312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17403594).

12045312 is an abundant number, since it is smaller than the sum of its proper divisors (22761876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12045312 is a wasteful number, since it uses less digits than its factorization.

12045312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333 (or 1312 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 12045312 is about 3470.6356766448. The cubic root of 12045312 is about 229.2306493008.

Adding to 12045312 its reverse (21354021), we get a palindrome (33399333).

The spelling of 12045312 in words is "twelve million, forty-five thousand, three hundred twelve".