13043985 has 8 divisors (see below), whose sum is σ = 20870400. Its totient is φ = 6956784.

The previous prime is 13043983. The next prime is 13043993. The reversal of 13043985 is 58934031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13043985 - 2¹ = 13043983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13043983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434785 + ... + 434814.

It is an arithmetic number, because the mean of its divisors is an integer number (2608800).

Almost surely, 2^13043985 is an apocalyptic number.

13043985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13043985 is a deficient number, since it is larger than the sum of its proper divisors (7826415).

13043985 is an equidigital number, since it uses as much as digits as its factorization.

13043985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869607.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 13043985 is about 3611.6457467476. The cubic root of 13043985 is about 235.3983585975.

It can be divided in two parts, 13043 and 985, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 13043985 in words is "thirteen million, forty-three thousand, nine hundred eighty-five".