13081247 has 2 divisors, whose sum is σ = 13081248. Its totient is φ = 13081246.

The previous prime is 13081231. The next prime is 13081259. The reversal of 13081247 is 74218031.

It is a strong prime.

It is an emirp because it is prime and its reverse (74218031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13081247 - 2⁴ = 13081231 is a prime.

It is a super-2 number, since 2×13081247² = 342238046150018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13081207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6540623 + 6540624.

It is an arithmetic number, because the mean of its divisors is an integer number (6540624).

Almost surely, 2^13081247 is an apocalyptic number.

13081247 is a deficient number, since it is larger than the sum of its proper divisors (1).

13081247 is an equidigital number, since it uses as much as digits as its factorization.

13081247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 13081247 is about 3616.8006580402. The cubic root of 13081247 is about 235.6222951374.

Adding to 13081247 its reverse (74218031), we get a palindrome (87299278).

The spelling of 13081247 in words is "thirteen million, eighty-one thousand, two hundred forty-seven".