109915 has 16 divisors (see below), whose sum is σ = 151200. Its totient is φ = 76032.

The previous prime is 109913. The next prime is 109919. The reversal of 109915 is 519901.

It is a cyclic number.

It is not a de Polignac number, because 109915 - 2¹ = 109913 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 109915.

It is not an unprimeable number, because it can be changed into a prime (109913) 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 15 ways as a sum of consecutive naturals, for example, 1191 + ... + 1279.

It is an arithmetic number, because the mean of its divisors is an integer number (9450).

2¹⁰⁹⁹¹⁵ is an apocalyptic number.

109915 is a deficient number, since it is larger than the sum of its proper divisors (41285).

109915 is a wasteful number, since it uses less digits than its factorization.

109915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 109915 is about 331.5343119498. The cubic root of 109915 is about 47.9018538544.

It can be divided in two parts, 109 and 915, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 109915 in words is "one hundred nine thousand, nine hundred fifteen".