13247985 has 16 divisors (see below), whose sum is σ = 21340800. Its totient is φ = 7017600.

The previous prime is 13247957. The next prime is 13247987. The reversal of 13247985 is 58974231.

13247985 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13247985 - 2⁹ = 13247473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13247987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660 + ... + 5189.

It is an arithmetic number, because the mean of its divisors is an integer number (1333800).

Almost surely, 2^13247985 is an apocalyptic number.

13247985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13247985 is a deficient number, since it is larger than the sum of its proper divisors (8092815).

13247985 is a wasteful number, since it uses less digits than its factorization.

13247985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008.

The product of its digits is 60480, while the sum is 39.

The square root of 13247985 is about 3639.7781525802. The cubic root of 13247985 is about 236.6191786842.

The spelling of 13247985 in words is "thirteen million, two hundred forty-seven thousand, nine hundred eighty-five".