4122809 has 4 divisors (see below), whose sum is σ = 4131216. Its totient is φ = 4114404.

The previous prime is 4122779. The next prime is 4122827. The reversal of 4122809 is 9082214.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9082214 = 2 ⋅4541107.

It is a cyclic number.

It is not a de Polignac number, because 4122809 - 2²⁰ = 3074233 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (4122709) 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, 3419 + ... + 4464.

It is an arithmetic number, because the mean of its divisors is an integer number (1032804).

Almost surely, 2^4122809 is an apocalyptic number.

It is an amenable number.

4122809 is a deficient number, since it is larger than the sum of its proper divisors (8407).

4122809 is an equidigital number, since it uses as much as digits as its factorization.

4122809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8406.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 4122809 is about 2030.4701426024. The cubic root of 4122809 is about 160.3483166923.

The spelling of 4122809 in words is "four million, one hundred twenty-two thousand, eight hundred nine".