13307985 has 24 divisors (see below), whose sum is σ = 23633064. Its totient is φ = 6923520.

The previous prime is 13307951. The next prime is 13307989. The reversal of 13307985 is 58970331.

It can be written as a sum of positive squares in 4 ways, for example, as 627264 + 12680721 = 792^2 + 3561^2 .

It is not a de Polignac number, because 13307985 - 2⁷ = 13307857 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13307989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1762 + ... + 5451.

It is an arithmetic number, because the mean of its divisors is an integer number (984711).

Almost surely, 2^13307985 is an apocalyptic number.

13307985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13307985 is a deficient number, since it is larger than the sum of its proper divisors (10325079).

13307985 is a wasteful number, since it uses less digits than its factorization.

13307985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7265 (or 7262 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 13307985 is about 3648.0111019568. The cubic root of 13307985 is about 236.9758561101.

The spelling of 13307985 in words is "thirteen million, three hundred seven thousand, nine hundred eighty-five".