5256109 has 4 divisors (see below), whose sum is σ = 5398204. Its totient is φ = 5114016.

The previous prime is 5256071. The next prime is 5256131. The reversal of 5256109 is 9016525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1822500 + 3433609 = 1350^2 + 1853^2 .

It is a cyclic number.

It is not a de Polignac number, because 5256109 - 2¹⁹ = 4731821 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5256509) 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, 70992 + ... + 71065.

It is an arithmetic number, because the mean of its divisors is an integer number (1349551).

Almost surely, 2^5256109 is an apocalyptic number.

It is an amenable number.

5256109 is a deficient number, since it is larger than the sum of its proper divisors (142095).

5256109 is a wasteful number, since it uses less digits than its factorization.

5256109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142094.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 5256109 is about 2292.6205529917. The cubic root of 5256109 is about 173.8687189605.

The spelling of 5256109 in words is "five million, two hundred fifty-six thousand, one hundred nine".