13131785 has 8 divisors (see below), whose sum is σ = 15793920. Its totient is φ = 10481584.

The previous prime is 13131761. The next prime is 13131787. The reversal of 13131785 is 58713131.

13131785 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13131785 - 2⁸ = 13131529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13131787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347 + ... + 5136.

It is an arithmetic number, because the mean of its divisors is an integer number (1974240).

Almost surely, 2^13131785 is an apocalyptic number.

It is an amenable number.

13131785 is a deficient number, since it is larger than the sum of its proper divisors (2662135).

13131785 is an equidigital number, since it uses as much as digits as its factorization.

13131785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5967.

The product of its digits is 2520, while the sum is 29.

The square root of 13131785 is about 3623.7804845217. The cubic root of 13131785 is about 235.9253390659.

The spelling of 13131785 in words is "thirteen million, one hundred thirty-one thousand, seven hundred eighty-five".