12418513 has 2 divisors, whose sum is σ = 12418514. Its totient is φ = 12418512.

The previous prime is 12418501. The next prime is 12418519. The reversal of 12418513 is 31581421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9784384 + 2634129 = 3128^2 + 1623^2 .

It is an emirp because it is prime and its reverse (31581421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12418513 is a prime.

It is equal to p₈₁₃₇₅₁ and since 12418513 and 813751 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12418519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6209256 + 6209257.

It is an arithmetic number, because the mean of its divisors is an integer number (6209257).

Almost surely, 2^12418513 is an apocalyptic number.

It is an amenable number.

12418513 is a deficient number, since it is larger than the sum of its proper divisors (1).

12418513 is an equidigital number, since it uses as much as digits as its factorization.

12418513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 25.

The square root of 12418513 is about 3523.9910612826. The cubic root of 12418513 is about 231.5740363130.

Adding to 12418513 its reverse (31581421), we get a palindrome (43999934).

The spelling of 12418513 in words is "twelve million, four hundred eighteen thousand, five hundred thirteen".