12751217 has 4 divisors (see below), whose sum is σ = 12991860. Its totient is φ = 12510576.

The previous prime is 12751201. The next prime is 12751231. The reversal of 12751217 is 71215721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71215721 = 3947 ⋅18043.

It can be written as a sum of positive squares in 2 ways, for example, as 8814961 + 3936256 = 2969^2 + 1984^2 .

It is a cyclic number.

It is not a de Polignac number, because 12751217 - 2⁴ = 12751201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12751237) 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, 120242 + ... + 120347.

It is an arithmetic number, because the mean of its divisors is an integer number (3247965).

Almost surely, 2^12751217 is an apocalyptic number.

It is an amenable number.

12751217 is a deficient number, since it is larger than the sum of its proper divisors (240643).

12751217 is an equidigital number, since it uses as much as digits as its factorization.

12751217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240642.

The product of its digits is 980, while the sum is 26.

The square root of 12751217 is about 3570.8846242913. The cubic root of 12751217 is about 233.6238691539.

Adding to 12751217 its reverse (71215721), we get a palindrome (83966938).

The spelling of 12751217 in words is "twelve million, seven hundred fifty-one thousand, two hundred seventeen".