201541 has 6 divisors (see below), whose sum is σ = 208230. Its totient is φ = 195048.

The previous prime is 201517. The next prime is 201547. The reversal of 201541 is 145102.

It can be written as a sum of positive squares in only one way, i.e., 184900 + 16641 = 430^2 + 129^2 .

It is not a de Polignac number, because 201541 - 2⁷ = 201413 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201547) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1795 + ... + 1903.

It is an arithmetic number, because the mean of its divisors is an integer number (34705).

2²⁰¹⁵⁴¹ is an apocalyptic number.

It is an amenable number.

201541 is a deficient number, since it is larger than the sum of its proper divisors (6689).

201541 is an equidigital number, since it uses as much as digits as its factorization.

201541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 201541 is about 448.9331798832. The cubic root of 201541 is about 58.6301676955.

Adding to 201541 its reverse (145102), we get a palindrome (346643).

The spelling of 201541 in words is "two hundred one thousand, five hundred forty-one".