13261403 has 2 divisors, whose sum is σ = 13261404. Its totient is φ = 13261402.

The previous prime is 13261357. The next prime is 13261421. The reversal of 13261403 is 30416231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13261403 is a prime.

It is not a weakly prime, because it can be changed into another prime (13261433) 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, 6630701 + 6630702.

It is an arithmetic number, because the mean of its divisors is an integer number (6630702).

Almost surely, 2^13261403 is an apocalyptic number.

13261403 is a deficient number, since it is larger than the sum of its proper divisors (1).

13261403 is an equidigital number, since it uses as much as digits as its factorization.

13261403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 13261403 is about 3641.6209303001. The cubic root of 13261403 is about 236.6990369883.

Adding to 13261403 its reverse (30416231), we get a palindrome (43677634).

The spelling of 13261403 in words is "thirteen million, two hundred sixty-one thousand, four hundred three".