194445 has 24 divisors (see below), whose sum is σ = 351000. Its totient is φ = 99456.

The previous prime is 194443. The next prime is 194471. The reversal of 194445 is 544491.

194445 = T₁₀₁ + T₁₀₂ + ... + T₁₂₉.

It can be written as a sum of positive squares in 4 ways, for example, as 2601 + 191844 = 51^2 + 438^2 .

It is not a de Polignac number, because 194445 - 2¹ = 194443 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 194445.

It is not an unprimeable number, because it can be changed into a prime (194443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1231 + ... + 1379.

It is an arithmetic number, because the mean of its divisors is an integer number (14625).

194445 is a Friedman number, since it can be written as (5*4+1)^4-9*4, using all its digits and the basic arithmetic operations.

2¹⁹⁴⁴⁴⁵ is an apocalyptic number.

194445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

194445 is a deficient number, since it is larger than the sum of its proper divisors (156555).

194445 is a wasteful number, since it uses less digits than its factorization.

194445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 186 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 194445 is about 440.9591817844. The cubic root of 194445 is about 57.9338325897.

The spelling of 194445 in words is "one hundred ninety-four thousand, four hundred forty-five".