12812747 has 4 divisors (see below), whose sum is σ = 13566456. Its totient is φ = 12059040.

The previous prime is 12812729. The next prime is 12812749. The reversal of 12812747 is 74721821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12812747 - 2⁸ = 12812491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12812749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376829 + ... + 376862.

It is an arithmetic number, because the mean of its divisors is an integer number (3391614).

Almost surely, 2^12812747 is an apocalyptic number.

12812747 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12812747 is a deficient number, since it is larger than the sum of its proper divisors (753709).

12812747 is an equidigital number, since it uses as much as digits as its factorization.

12812747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753708.

The product of its digits is 6272, while the sum is 32.

The square root of 12812747 is about 3579.4897681094. The cubic root of 12812747 is about 233.9990442409. Note that the first 3 decimals are identical.

The spelling of 12812747 in words is "twelve million, eight hundred twelve thousand, seven hundred forty-seven".