13145138 has 12 divisors (see below), whose sum is σ = 20269242. Its totient is φ = 6393600.

The previous prime is 13145123. The next prime is 13145159. The reversal of 13145138 is 83154131.

It can be written as a sum of positive squares in 3 ways, for example, as 13010449 + 134689 = 3607^2 + 367^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 338 + ... + 5138.

Almost surely, 2^13145138 is an apocalyptic number.

13145138 is a deficient number, since it is larger than the sum of its proper divisors (7124104).

13145138 is an equidigital number, since it uses as much as digits as its factorization.

13145138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877 (or 4840 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 13145138 is about 3625.6224293216. The cubic root of 13145138 is about 236.0052785375.

Adding to 13145138 its reverse (83154131), we get a palindrome (96299269).

The spelling of 13145138 in words is "thirteen million, one hundred forty-five thousand, one hundred thirty-eight".