13681265 has 8 divisors (see below), whose sum is σ = 17680488. Its totient is φ = 10103040.

The previous prime is 13681259. The next prime is 13681271. The reversal of 13681265 is 56218631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13681259) and next prime (13681271).

It can be written as a sum of positive squares in 4 ways, for example, as 13456 + 13667809 = 116^2 + 3697^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-13681265 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105176 + ... + 105305.

It is an arithmetic number, because the mean of its divisors is an integer number (2210061).

Almost surely, 2^13681265 is an apocalyptic number.

It is an amenable number.

13681265 is a deficient number, since it is larger than the sum of its proper divisors (3999223).

13681265 is a wasteful number, since it uses less digits than its factorization.

13681265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210499.

The product of its digits is 8640, while the sum is 32.

The square root of 13681265 is about 3698.8194062430. The cubic root of 13681265 is about 239.1711279436.

Adding to 13681265 its reverse (56218631), we get a palindrome (69899896).

The spelling of 13681265 in words is "thirteen million, six hundred eighty-one thousand, two hundred sixty-five".