13611265 has 8 divisors (see below), whose sum is σ = 16495848. Its totient is φ = 10780800.

The previous prime is 13611259. The next prime is 13611281. The reversal of 13611265 is 56211631.

It can be written as a sum of positive squares in 4 ways, for example, as 5793649 + 7817616 = 2407^2 + 2796^2 .

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

It is not a de Polignac number, because 13611265 - 2¹⁷ = 13480193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12972 + ... + 13981.

It is an arithmetic number, because the mean of its divisors is an integer number (2061981).

Almost surely, 2^13611265 is an apocalyptic number.

It is an amenable number.

13611265 is a deficient number, since it is larger than the sum of its proper divisors (2884583).

13611265 is a wasteful number, since it uses less digits than its factorization.

13611265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27059.

The product of its digits is 1080, while the sum is 25.

The square root of 13611265 is about 3689.3447927783. The cubic root of 13611265 is about 238.7625250412.

Adding to 13611265 its reverse (56211631), we get a palindrome (69822896).

The spelling of 13611265 in words is "thirteen million, six hundred eleven thousand, two hundred sixty-five".