13081278 has 32 divisors (see below), whose sum is σ = 30030336. Its totient is φ = 3721248.

The previous prime is 13081259. The next prime is 13081283. The reversal of 13081278 is 87218031.

It is a happy number.

It is a super-2 number, since 2×13081278² = 342239668226568, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11775 + ... + 12837.

It is an arithmetic number, because the mean of its divisors is an integer number (938448).

Almost surely, 2^13081278 is an apocalyptic number.

13081278 is an abundant number, since it is smaller than the sum of its proper divisors (16949058).

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

13081278 is a wasteful number, since it uses less digits than its factorization.

13081278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 13081278 is about 3616.8049435932. The cubic root of 13081278 is about 235.6224812635.

The spelling of 13081278 in words is "thirteen million, eighty-one thousand, two hundred seventy-eight".