201445 has 4 divisors (see below), whose sum is σ = 241740. Its totient is φ = 161152.

The previous prime is 201437. The next prime is 201449. The reversal of 201445 is 544102.

201445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146689 + 54756 = 383^2 + 234^2 .

It is a cyclic number.

It is not a de Polignac number, because 201445 - 2³ = 201437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20140 + ... + 20149.

It is an arithmetic number, because the mean of its divisors is an integer number (60435).

2²⁰¹⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

201445 is a deficient number, since it is larger than the sum of its proper divisors (40295).

201445 is an equidigital number, since it uses as much as digits as its factorization.

201445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40294.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 201445 is about 448.8262470043. The cubic root of 201445 is about 58.6208571168.

Adding to 201445 its reverse (544102), we get a palindrome (745547).

It can be divided in two parts, 201 and 445, that added together give a palindrome (646).

The spelling of 201445 in words is "two hundred one thousand, four hundred forty-five".