13226665 has 8 divisors (see below), whose sum is σ = 15988680. Its totient is φ = 10503552.

The previous prime is 13226623. The next prime is 13226683. The reversal of 13226665 is 56662231.

13226665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 345744 + 12880921 = 588^2 + 3589^2 .

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 13226665 - 2¹³ = 13218473 is a prime.

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, 8970 + ... + 10339.

It is an arithmetic number, because the mean of its divisors is an integer number (1998585).

Almost surely, 2^13226665 is an apocalyptic number.

It is an amenable number.

13226665 is a deficient number, since it is larger than the sum of its proper divisors (2762015).

13226665 is a wasteful number, since it uses less digits than its factorization.

13226665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19451.

The product of its digits is 12960, while the sum is 31.

The square root of 13226665 is about 3636.8482233934. The cubic root of 13226665 is about 236.4921800131.

Adding to 13226665 its reverse (56662231), we get a palindrome (69888896).

The spelling of 13226665 in words is "thirteen million, two hundred twenty-six thousand, six hundred sixty-five".