13271985 has 32 divisors (see below), whose sum is σ = 24986880. Its totient is φ = 6660864.

The previous prime is 13271981. The next prime is 13272023. The reversal of 13271985 is 58917231.

It is not a de Polignac number, because 13271985 - 2² = 13271981 is a prime.

It is a super-2 number, since 2×13271985² = 352291171680450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13271981) 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 in 31 ways as a sum of consecutive naturals, for example, 597 + ... + 5186.

It is an arithmetic number, because the mean of its divisors is an integer number (780840).

Almost surely, 2^13271985 is an apocalyptic number.

13271985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13271985 is a deficient number, since it is larger than the sum of its proper divisors (11714895).

13271985 is a wasteful number, since it uses less digits than its factorization.

13271985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5814 (or 5808 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 13271985 is about 3643.0735649998. The cubic root of 13271985 is about 236.7619786262.

The spelling of 13271985 in words is "thirteen million, two hundred seventy-one thousand, nine hundred eighty-five".