852109 has 6 divisors (see below), whose sum is σ = 870090. Its totient is φ = 834480.

The previous prime is 852101. The next prime is 852121. The reversal of 852109 is 901258.

It can be written as a sum of positive squares in 3 ways, for example, as 2025 + 850084 = 45^2 + 922^2 .

It is not a de Polignac number, because 852109 - 2³ = 852101 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (852101) 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 5 ways as a sum of consecutive naturals, for example, 3607 + ... + 3835.

It is an arithmetic number, because the mean of its divisors is an integer number (145015).

2⁸⁵²¹⁰⁹ is an apocalyptic number.

It is an amenable number.

852109 is a deficient number, since it is larger than the sum of its proper divisors (17981).

852109 is an equidigital number, since it uses as much as digits as its factorization.

852109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 852109 is about 923.0975029757. The cubic root of 852109 is about 94.8051036675.

It can be divided in two parts, 852 and 109, that added together give a square (961 = 31²).

The spelling of 852109 in words is "eight hundred fifty-two thousand, one hundred nine".