190845 has 12 divisors (see below), whose sum is σ = 330876. Its totient is φ = 101760.

The previous prime is 190843. The next prime is 190871. The reversal of 190845 is 548091.

It can be written as a sum of positive squares in 2 ways, for example, as 142884 + 47961 = 378^2 + 219^2 .

It is not a de Polignac number, because 190845 - 2¹ = 190843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2076 + ... + 2165.

It is an arithmetic number, because the mean of its divisors is an integer number (27573).

2¹⁹⁰⁸⁴⁵ is an apocalyptic number.

190845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

190845 is a deficient number, since it is larger than the sum of its proper divisors (140031).

190845 is a wasteful number, since it uses less digits than its factorization.

190845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252 (or 4249 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 190845 is about 436.8581005315. The cubic root of 190845 is about 57.5740696363.

It can be divided in two parts, 1908 and 45, that added together give a triangular number (1953 = T₆₂).

The spelling of 190845 in words is "one hundred ninety thousand, eight hundred forty-five".