13143257 has 2 divisors, whose sum is σ = 13143258. Its totient is φ = 13143256.

The previous prime is 13143241. The next prime is 13143259. The reversal of 13143257 is 75234131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9834496 + 3308761 = 3136^2 + 1819^2 .

It is a cyclic number.

It is not a de Polignac number, because 13143257 - 2⁴ = 13143241 is a prime.

Together with 13143259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13143259) 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, 6571628 + 6571629.

It is an arithmetic number, because the mean of its divisors is an integer number (6571629).

Almost surely, 2^13143257 is an apocalyptic number.

It is an amenable number.

13143257 is a deficient number, since it is larger than the sum of its proper divisors (1).

13143257 is an equidigital number, since it uses as much as digits as its factorization.

13143257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 26.

The square root of 13143257 is about 3625.3630163061. The cubic root of 13143257 is about 235.9940209631.

Adding to 13143257 its reverse (75234131), we get a palindrome (88377388).

The spelling of 13143257 in words is "thirteen million, one hundred forty-three thousand, two hundred fifty-seven".