1052209 has 4 divisors (see below), whose sum is σ = 1072116. Its totient is φ = 1032304.

The previous prime is 1052203. The next prime is 1052221. The reversal of 1052209 is 9022501.

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 451584 + 600625 = 672^2 + 775^2 .

It is a cyclic number.

It is not a de Polignac number, because 1052209 - 2⁹ = 1051697 is a prime.

It is a super-2 number, since 2×1052209² = 2214287559362, which contains 22 as substring.

It is a Duffinian number.

1052209 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1052203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9874 + ... + 9979.

It is an arithmetic number, because the mean of its divisors is an integer number (268029).

2^1052209 is an apocalyptic number.

It is an amenable number.

1052209 is a deficient number, since it is larger than the sum of its proper divisors (19907).

1052209 is an equidigital number, since it uses as much as digits as its factorization.

1052209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19906.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1052209 is about 1025.7723919077. The cubic root of 1052209 is about 101.7108625667.

The spelling of 1052209 in words is "one million, fifty-two thousand, two hundred nine".