13266387 has 12 divisors (see below), whose sum is σ = 19680960. Its totient is φ = 8605008.

The previous prime is 13266371. The next prime is 13266397. The reversal of 13266387 is 78366231.

It is a happy number.

13266387 is a `hidden beast` number, since 13 + 2 + 6 + 638 + 7 = 666.

It is not a de Polignac number, because 13266387 - 2⁴ = 13266371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13266347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19587 + ... + 20252.

It is an arithmetic number, because the mean of its divisors is an integer number (1640080).

Almost surely, 2^13266387 is an apocalyptic number.

13266387 is a deficient number, since it is larger than the sum of its proper divisors (6414573).

13266387 is a wasteful number, since it uses less digits than its factorization.

13266387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39882 (or 39879 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 13266387 is about 3642.3051766704. The cubic root of 13266387 is about 236.7286859438.

The spelling of 13266387 in words is "thirteen million, two hundred sixty-six thousand, three hundred eighty-seven".