12499217 has 2 divisors, whose sum is σ = 12499218. Its totient is φ = 12499216.

The previous prime is 12499211. The next prime is 12499237. The reversal of 12499217 is 71299421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8042896 + 4456321 = 2836^2 + 2111^2 .

It is a cyclic number.

It is not a de Polignac number, because 12499217 - 2²² = 8304913 is a prime.

It is a super-2 number, since 2×12499217² = 312460851226178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12499211) 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 as a sum of consecutive naturals, namely, 6249608 + 6249609.

It is an arithmetic number, because the mean of its divisors is an integer number (6249609).

Almost surely, 2^12499217 is an apocalyptic number.

It is an amenable number.

12499217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12499217 is an equidigital number, since it uses as much as digits as its factorization.

12499217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 12499217 is about 3535.4231712767. The cubic root of 12499217 is about 232.0745957607.

The spelling of 12499217 in words is "twelve million, four hundred ninety-nine thousand, two hundred seventeen".