109285 has 8 divisors (see below), whose sum is σ = 143136. Its totient is φ = 79440.

The previous prime is 109279. The next prime is 109297. The reversal of 109285 is 582901.

109285 = 100² + 101² + ... + 109².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 109285 - 2⁵ = 109253 is a prime.

It is a super-2 number, since 2×109285² = 23886422450, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939 + ... + 1048.

It is an arithmetic number, because the mean of its divisors is an integer number (17892).

2¹⁰⁹²⁸⁵ is an apocalyptic number.

It is an amenable number.

109285 is a deficient number, since it is larger than the sum of its proper divisors (33851).

109285 is a wasteful number, since it uses less digits than its factorization.

109285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003.

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

The square root of 109285 is about 330.5828186703. The cubic root of 109285 is about 47.8101587274.

The spelling of 109285 in words is "one hundred nine thousand, two hundred eighty-five".