13142209 has 4 divisors (see below), whose sum is σ = 13193604. Its totient is φ = 13090816.

The previous prime is 13142197. The next prime is 13142231. The reversal of 13142209 is 90224131.

13142209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90224131 = 73 ⋅1235947.

It can be written as a sum of positive squares in 2 ways, for example, as 12623809 + 518400 = 3553^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 13142209 - 2¹⁵ = 13109441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13142209.

It is not an unprimeable number, because it can be changed into a prime (13142279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25312 + ... + 25825.

It is an arithmetic number, because the mean of its divisors is an integer number (3298401).

Almost surely, 2^13142209 is an apocalyptic number.

It is an amenable number.

13142209 is a deficient number, since it is larger than the sum of its proper divisors (51395).

13142209 is an equidigital number, since it uses as much as digits as its factorization.

13142209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51394.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 13142209 is about 3625.2184761749. The cubic root of 13142209 is about 235.9877483346.

The spelling of 13142209 in words is "thirteen million, one hundred forty-two thousand, two hundred nine".