12517481 has 2 divisors, whose sum is σ = 12517482. Its totient is φ = 12517480.

The previous prime is 12517403. The next prime is 12517489. The reversal of 12517481 is 18471521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9486400 + 3031081 = 3080^2 + 1741^2 .

It is a cyclic number.

It is not a de Polignac number, because 12517481 - 2¹⁸ = 12255337 is a prime.

It is a super-2 number, since 2×12517481² = 313374661170722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12517489) 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 as a sum of consecutive naturals, namely, 6258740 + 6258741.

It is an arithmetic number, because the mean of its divisors is an integer number (6258741).

Almost surely, 2^12517481 is an apocalyptic number.

It is an amenable number.

12517481 is a deficient number, since it is larger than the sum of its proper divisors (1).

12517481 is an equidigital number, since it uses as much as digits as its factorization.

12517481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 29.

The square root of 12517481 is about 3538.0052289390. The cubic root of 12517481 is about 232.1875774403.

The spelling of 12517481 in words is "twelve million, five hundred seventeen thousand, four hundred eighty-one".