13143266 has 4 divisors (see below), whose sum is σ = 19714902. Its totient is φ = 6571632.

The previous prime is 13143259. The next prime is 13143271. The reversal of 13143266 is 66234131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66234131 = 251 ⋅263881.

It can be written as a sum of positive squares in only one way, i.e., 7756225 + 5387041 = 2785^2 + 2321^2 .

It is a super-2 number, since 2×13143266² = 345490882293512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3285815 + ... + 3285818.

Almost surely, 2^13143266 is an apocalyptic number.

13143266 is a deficient number, since it is larger than the sum of its proper divisors (6571636).

13143266 is an equidigital number, since it uses as much as digits as its factorization.

13143266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6571635.

The product of its digits is 2592, while the sum is 26.

The square root of 13143266 is about 3625.3642575609. The cubic root of 13143266 is about 235.9940748297.

Adding to 13143266 its reverse (66234131), we get a palindrome (79377397).

The spelling of 13143266 in words is "thirteen million, one hundred forty-three thousand, two hundred sixty-six".