201090 has 16 divisors (see below), whose sum is σ = 482688. Its totient is φ = 53616.

The previous prime is 201073. The next prime is 201101. The reversal of 201090 is 90102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

201090 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3322 + ... + 3381.

It is an arithmetic number, because the mean of its divisors is an integer number (30168).

2²⁰¹⁰⁹⁰ is an apocalyptic number.

201090 is an abundant number, since it is smaller than the sum of its proper divisors (281598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201090 is a wasteful number, since it uses less digits than its factorization.

201090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6713.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 201090 is about 448.4305966368. The cubic root of 201090 is about 58.5864016562.

Adding to 201090 its sum of digits (12), we get a palindrome (201102).

Adding to 201090 its reverse (90102), we get a palindrome (291192).

The spelling of 201090 in words is "two hundred one thousand, ninety".