13250809 has 16 divisors (see below), whose sum is σ = 16390080. Its totient is φ = 10532160.

The previous prime is 13250807. The next prime is 13250819. The reversal of 13250809 is 90805231.

13250809 = T₁₂ + T₁₃ + ... + T₄₂₉.

13250809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13250809 - 2¹ = 13250807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13250807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279 + ... + 5155.

It is an arithmetic number, because the mean of its divisors is an integer number (1024380).

Almost surely, 2^13250809 is an apocalyptic number.

13250809 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13250809 is a deficient number, since it is larger than the sum of its proper divisors (3139271).

13250809 is a wasteful number, since it uses less digits than its factorization.

13250809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4920.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 13250809 is about 3640.1660676403. The cubic root of 13250809 is about 236.6359904254.

The spelling of 13250809 in words is "thirteen million, two hundred fifty thousand, eight hundred nine".