5285209 has 2 divisors, whose sum is σ = 5285210. Its totient is φ = 5285208.

The previous prime is 5285201. The next prime is 5285219. The reversal of 5285209 is 9025825.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3667225 + 1617984 = 1915^2 + 1272^2 .

It is a cyclic number.

It is not a de Polignac number, because 5285209 - 2³ = 5285201 is a prime.

It is not a weakly prime, because it can be changed into another prime (5285201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2642604 + 2642605.

It is an arithmetic number, because the mean of its divisors is an integer number (2642605).

Almost surely, 2^5285209 is an apocalyptic number.

It is an amenable number.

5285209 is a deficient number, since it is larger than the sum of its proper divisors (1).

5285209 is an equidigital number, since it uses as much as digits as its factorization.

5285209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 5285209 is about 2298.9582423350. The cubic root of 5285209 is about 174.1889984058.

It can be divided in two parts, 528520 and 9, that added together give a square (528529 = 727²).

The spelling of 5285209 in words is "five million, two hundred eighty-five thousand, two hundred nine".