12547812 has 12 divisors (see below), whose sum is σ = 29278256. Its totient is φ = 4182600.

The previous prime is 12547789. The next prime is 12547813. The reversal of 12547812 is 21874521.

It is a tau number, because it is divible by the number of its divisors (12).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 12547812.

It is not an unprimeable number, because it can be changed into a prime (12547813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522814 + ... + 522837.

Almost surely, 2^12547812 is an apocalyptic number.

12547812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12547812 is an abundant number, since it is smaller than the sum of its proper divisors (16730444).

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

12547812 is a wasteful number, since it uses less digits than its factorization.

12547812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045658 (or 1045656 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 12547812 is about 3542.2890904047. The cubic root of 12547812 is about 232.3749634078.

The spelling of 12547812 in words is "twelve million, five hundred forty-seven thousand, eight hundred twelve".