13197865 has 8 divisors (see below), whose sum is σ = 16769160. Its totient is φ = 9937152.

The previous prime is 13197851. The next prime is 13197869. The reversal of 13197865 is 56879131.

It can be written as a sum of positive squares in 4 ways, for example, as 151321 + 13046544 = 389^2 + 3612^2 .

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 13197865 - 2¹¹ = 13195817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13197869) 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, 77550 + ... + 77719.

It is an arithmetic number, because the mean of its divisors is an integer number (2096145).

Almost surely, 2^13197865 is an apocalyptic number.

It is an amenable number.

13197865 is a deficient number, since it is larger than the sum of its proper divisors (3571295).

13197865 is a wasteful number, since it uses less digits than its factorization.

13197865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155291.

The product of its digits is 45360, while the sum is 40.

The square root of 13197865 is about 3632.8865933304. The cubic root of 13197865 is about 236.3204077076.

The spelling of 13197865 in words is "thirteen million, one hundred ninety-seven thousand, eight hundred sixty-five".