13028581 has 2 divisors, whose sum is σ = 13028582. Its totient is φ = 13028580.

The previous prime is 13028539. The next prime is 13028591. The reversal of 13028581 is 18582031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11840481 + 1188100 = 3441^2 + 1090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13028581 is a prime.

It is a super-2 number, since 2×13028581² = 339487845747122, 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 (13028501) 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, 6514290 + 6514291.

It is an arithmetic number, because the mean of its divisors is an integer number (6514291).

Almost surely, 2^13028581 is an apocalyptic number.

It is an amenable number.

13028581 is a deficient number, since it is larger than the sum of its proper divisors (1).

13028581 is an equidigital number, since it uses as much as digits as its factorization.

13028581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 13028581 is about 3609.5125709713. The cubic root of 13028581 is about 235.3056593027.

The spelling of 13028581 in words is "thirteen million, twenty-eight thousand, five hundred eighty-one".