201290 has 8 divisors (see below), whose sum is σ = 362340. Its totient is φ = 80512.

The previous prime is 201287. The next prime is 201307. The reversal of 201290 is 92102.

It can be written as a sum of positive squares in 2 ways, for example, as 196249 + 5041 = 443^2 + 71^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10055 + ... + 10074.

2²⁰¹²⁹⁰ is an apocalyptic number.

201290 is a deficient number, since it is larger than the sum of its proper divisors (161050).

201290 is a wasteful number, since it uses less digits than its factorization.

201290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20136.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 201290 is about 448.6535411651. The cubic root of 201290 is about 58.6058181661.

Adding to 201290 its reverse (92102), we get a palindrome (293392).

The spelling of 201290 in words is "two hundred one thousand, two hundred ninety".