201291 has 8 divisors (see below), whose sum is σ = 270480. Its totient is φ = 133152.

The previous prime is 201287. The next prime is 201307. The reversal of 201291 is 192102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201291 - 2² = 201287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201291.

It is not an unprimeable number, because it can be changed into a prime (201211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541 + ... + 833.

It is an arithmetic number, because the mean of its divisors is an integer number (33810).

2²⁰¹²⁹¹ is an apocalyptic number.

201291 is a deficient number, since it is larger than the sum of its proper divisors (69189).

201291 is a wasteful number, since it uses less digits than its factorization.

201291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 201291 is about 448.6546556094. The cubic root of 201291 is about 58.6059152163.

Adding to 201291 its reverse (192102), we get a palindrome (393393).

The spelling of 201291 in words is "two hundred one thousand, two hundred ninety-one".