5122809 has 6 divisors (see below), whose sum is σ = 7399626. Its totient is φ = 3415200.

The previous prime is 5122807. The next prime is 5122847. The reversal of 5122809 is 9082215.

It can be written as a sum of positive squares in only one way, i.e., 4112784 + 1010025 = 2028^2 + 1005^2 .

It is not a de Polignac number, because 5122809 - 2¹ = 5122807 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5122807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 284592 + ... + 284609.

It is an arithmetic number, because the mean of its divisors is an integer number (1233271).

Almost surely, 2^5122809 is an apocalyptic number.

It is an amenable number.

5122809 is a deficient number, since it is larger than the sum of its proper divisors (2276817).

5122809 is a wasteful number, since it uses less digits than its factorization.

5122809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569207 (or 569204 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 5122809 is about 2263.3623218566. The cubic root of 5122809 is about 172.3862892684.

It can be divided in two parts, 512 and 2809, that added together give a triangular number (3321 = T₈₁).

The spelling of 5122809 in words is "five million, one hundred twenty-two thousand, eight hundred nine".