12647533 has 4 divisors (see below), whose sum is σ = 12656988. Its totient is φ = 12638080.

The previous prime is 12647527. The next prime is 12647561. The reversal of 12647533 is 33574621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6160324 + 6487209 = 2482^2 + 2547^2 .

It is a cyclic number.

It is not a de Polignac number, because 12647533 - 2¹⁷ = 12516461 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12647495 and 12647504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12647513) 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, 2308 + ... + 5533.

It is an arithmetic number, because the mean of its divisors is an integer number (3164247).

Almost surely, 2^12647533 is an apocalyptic number.

It is an amenable number.

12647533 is a deficient number, since it is larger than the sum of its proper divisors (9455).

12647533 is an equidigital number, since it uses as much as digits as its factorization.

12647533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9454.

The product of its digits is 15120, while the sum is 31.

The square root of 12647533 is about 3556.3370200250. The cubic root of 12647533 is about 232.9889229508.

The spelling of 12647533 in words is "twelve million, six hundred forty-seven thousand, five hundred thirty-three".