13171278 has 32 divisors (see below), whose sum is σ = 27734400. Its totient is φ = 4163936.

The previous prime is 13171273. The next prime is 13171289. The reversal of 13171278 is 87217131.

13171278 is a nontrivial binomial coefficient, being equal to C(5133, 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13171271) 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 in 15 ways as a sum of consecutive naturals, for example, 9625 + ... + 10907.

It is an arithmetic number, because the mean of its divisors is an integer number (866700).

Almost surely, 2^13171278 is an apocalyptic number.

13171278 is the 5132-nd triangular number.

13171278 is an abundant number, since it is smaller than the sum of its proper divisors (14563122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13171278 is a wasteful number, since it uses less digits than its factorization.

13171278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376.

The product of its digits is 2352, while the sum is 30.

The square root of 13171278 is about 3629.2255372187. The cubic root of 13171278 is about 236.1616124666.

The spelling of 13171278 in words is "thirteen million, one hundred seventy-one thousand, two hundred seventy-eight".