109945 has 8 divisors (see below), whose sum is σ = 144000. Its totient is φ = 79920.

The previous prime is 109943. The next prime is 109961. The reversal of 109945 is 549901.

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

It is not a de Polignac number, because 109945 - 2¹ = 109943 is a prime.

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 (109943) 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, 945 + ... + 1054.

It is an arithmetic number, because the mean of its divisors is an integer number (18000).

2¹⁰⁹⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

109945 is a deficient number, since it is larger than the sum of its proper divisors (34055).

109945 is a wasteful number, since it uses less digits than its factorization.

109945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 109945 is about 331.5795530487. The cubic root of 109945 is about 47.9062115395.

It can be divided in two parts, 1099 and 45, that multiplied together give a triangular number (49455 = T₃₁₄).

The spelling of 109945 in words is "one hundred nine thousand, nine hundred forty-five".