12547312 has 40 divisors (see below), whose sum is σ = 25748352. Its totient is φ = 5913600.

The previous prime is 12547307. The next prime is 12547319. The reversal of 12547312 is 21374521.

It is a happy number.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12547319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20028 + ... + 20644.

Almost surely, 2^12547312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12547312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12874176).

12547312 is an abundant number, since it is smaller than the sum of its proper divisors (13201040).

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

12547312 is a wasteful number, since it uses less digits than its factorization.

12547312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697 (or 691 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 12547312 is about 3542.2185138695. The cubic root of 12547312 is about 232.3718768398.

The spelling of 12547312 in words is "twelve million, five hundred forty-seven thousand, three hundred twelve".