13135765 has 8 divisors (see below), whose sum is σ = 15784920. Its totient is φ = 10493952.

The previous prime is 13135739. The next prime is 13135789. The reversal of 13135765 is 56753131.

It can be written as a sum of positive squares in 4 ways, for example, as 1067089 + 12068676 = 1033^2 + 3474^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13135765 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3541 + ... + 6229.

It is an arithmetic number, because the mean of its divisors is an integer number (1973115).

Almost surely, 2^13135765 is an apocalyptic number.

It is an amenable number.

13135765 is a deficient number, since it is larger than the sum of its proper divisors (2649155).

13135765 is an equidigital number, since it uses as much as digits as its factorization.

13135765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3671.

The product of its digits is 9450, while the sum is 31.

The square root of 13135765 is about 3624.3295931800. The cubic root of 13135765 is about 235.9491715203.

Adding to 13135765 its reverse (56753131), we get a palindrome (69888896).

The spelling of 13135765 in words is "thirteen million, one hundred thirty-five thousand, seven hundred sixty-five".