13500871 has 4 divisors (see below), whose sum is σ = 13557600. Its totient is φ = 13444144.

The previous prime is 13500869. The next prime is 13500881. The reversal of 13500871 is 17800531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17800531 = 7 ⋅2542933.

It is a cyclic number.

It is not a de Polignac number, because 13500871 - 2¹ = 13500869 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13500881) 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, 28006 + ... + 28483.

It is an arithmetic number, because the mean of its divisors is an integer number (3389400).

Almost surely, 2^13500871 is an apocalyptic number.

13500871 is a deficient number, since it is larger than the sum of its proper divisors (56729).

13500871 is an equidigital number, since it uses as much as digits as its factorization.

13500871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56728.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 13500871 is about 3674.3531403500. The cubic root of 13500871 is about 238.1152785233.

The spelling of 13500871 in words is "thirteen million, five hundred thousand, eight hundred seventy-one".