115090 has 16 divisors (see below), whose sum is σ = 219672. Its totient is φ = 43264.

The previous prime is 115079. The next prime is 115099. The reversal of 115090 is 90511.

It can be written as a sum of positive squares in 4 ways, for example, as 114921 + 169 = 339^2 + 13^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115099) by changing a digit.

115090 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 169 + ... + 508.

2¹¹⁵⁰⁹⁰ is an apocalyptic number.

115090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115090 is the 170-th decagonal number.

115090 is a deficient number, since it is larger than the sum of its proper divisors (104582).

115090 is a wasteful number, since it uses less digits than its factorization.

115090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 115090 is about 339.2491709644. The cubic root of 115090 is about 48.6421239442.

The spelling of 115090 in words is "one hundred fifteen thousand, ninety".