13116857 has 4 divisors (see below), whose sum is σ = 14125860. Its totient is φ = 12107856.

The previous prime is 13116853. The next prime is 13116919. The reversal of 13116857 is 75861131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75861131 = 3361 ⋅22571.

It can be written as a sum of positive squares in 2 ways, for example, as 3728761 + 9388096 = 1931^2 + 3064^2 .

It is a cyclic number.

It is not a de Polignac number, because 13116857 - 2² = 13116853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13116853) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 504482 + ... + 504507.

It is an arithmetic number, because the mean of its divisors is an integer number (3531465).

Almost surely, 2^13116857 is an apocalyptic number.

It is an amenable number.

13116857 is a deficient number, since it is larger than the sum of its proper divisors (1009003).

13116857 is a wasteful number, since it uses less digits than its factorization.

13116857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009002.

The product of its digits is 5040, while the sum is 32.

The square root of 13116857 is about 3621.7201714103. The cubic root of 13116857 is about 235.8359064704.

Adding to 13116857 its reverse (75861131), we get a palindrome (88977988).

The spelling of 13116857 in words is "thirteen million, one hundred sixteen thousand, eight hundred fifty-seven".