12733247 has 4 divisors (see below), whose sum is σ = 13043856. Its totient is φ = 12422640.

The previous prime is 12733229. The next prime is 12733261. The reversal of 12733247 is 74233721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74233721 = 4079 ⋅18199.

It is a cyclic number.

It is not a de Polignac number, because 12733247 - 2⁶ = 12733183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12733207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155243 + ... + 155324.

It is an arithmetic number, because the mean of its divisors is an integer number (3260964).

Almost surely, 2^12733247 is an apocalyptic number.

12733247 is a deficient number, since it is larger than the sum of its proper divisors (310609).

12733247 is an equidigital number, since it uses as much as digits as its factorization.

12733247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310608.

The product of its digits is 7056, while the sum is 29.

The square root of 12733247 is about 3568.3675539384. The cubic root of 12733247 is about 233.5140706244.

Adding to 12733247 its reverse (74233721), we get a palindrome (86966968).

The spelling of 12733247 in words is "twelve million, seven hundred thirty-three thousand, two hundred forty-seven".