109045 has 8 divisors (see below), whose sum is σ = 132696. Its totient is φ = 86016.

The previous prime is 109037. The next prime is 109049. The reversal of 109045 is 540901.

109045 = 233² + 234².

It can be written as a sum of positive squares in 4 ways, for example, as 2116 + 106929 = 46^2 + 327^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 109045 - 2³ = 109037 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109049) 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 7 ways as a sum of consecutive naturals, for example, 469 + ... + 661.

It is an arithmetic number, because the mean of its divisors is an integer number (16587).

2¹⁰⁹⁰⁴⁵ is an apocalyptic number.

109045 is the 234-th centered square number.

It is an amenable number.

109045 is a deficient number, since it is larger than the sum of its proper divisors (23651).

109045 is a wasteful number, since it uses less digits than its factorization.

109045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311.

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

The square root of 109045 is about 330.2196238869. The cubic root of 109045 is about 47.7751345612.

Adding to 109045 its reverse (540901), we get a palindrome (649946).

The spelling of 109045 in words is "one hundred nine thousand, forty-five".