12511117 has 2 divisors, whose sum is σ = 12511118. Its totient is φ = 12511116.

The previous prime is 12511097. The next prime is 12511141. The reversal of 12511117 is 71111521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10361961 + 2149156 = 3219^2 + 1466^2 .

It is a cyclic number.

It is not a de Polignac number, because 12511117 - 2⁷ = 12510989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12511094 and 12511103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12515117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6255558 + 6255559.

It is an arithmetic number, because the mean of its divisors is an integer number (6255559).

Almost surely, 2^12511117 is an apocalyptic number.

It is an amenable number.

12511117 is a deficient number, since it is larger than the sum of its proper divisors (1).

12511117 is an equidigital number, since it uses as much as digits as its factorization.

12511117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70, while the sum is 19.

The square root of 12511117 is about 3537.1057377466. The cubic root of 12511117 is about 232.1482220186.

Adding to 12511117 its reverse (71111521), we get a palindrome (83622638).

The spelling of 12511117 in words is "twelve million, five hundred eleven thousand, one hundred seventeen".