12553217 has 4 divisors (see below), whose sum is σ = 12574980. Its totient is φ = 12531456.

The previous prime is 12553213. The next prime is 12553241. The reversal of 12553217 is 71235521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10491121 + 2062096 = 3239^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 12553217 - 2² = 12553213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12553213) 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, 9992 + ... + 11177.

It is an arithmetic number, because the mean of its divisors is an integer number (3143745).

Almost surely, 2^12553217 is an apocalyptic number.

It is an amenable number.

12553217 is a deficient number, since it is larger than the sum of its proper divisors (21763).

12553217 is an equidigital number, since it uses as much as digits as its factorization.

12553217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21762.

The product of its digits is 2100, while the sum is 26.

The square root of 12553217 is about 3543.0519330092. The cubic root of 12553217 is about 232.4083239751.

Adding to 12553217 its reverse (71235521), we get a palindrome (83788738).

The spelling of 12553217 in words is "twelve million, five hundred fifty-three thousand, two hundred seventeen".