201912 has 32 divisors (see below), whose sum is σ = 518400. Its totient is φ = 65504.

The previous prime is 201911. The next prime is 201919. The reversal of 201912 is 219102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 201891 and 201900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201911) 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, 1039 + ... + 1217.

It is an arithmetic number, because the mean of its divisors is an integer number (16200).

2²⁰¹⁹¹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259200).

201912 is an abundant number, since it is smaller than the sum of its proper divisors (316488).

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

201912 is a wasteful number, since it uses less digits than its factorization.

201912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 231 counting only the distinct ones).

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

The square root of 201912 is about 449.3461917052. The cubic root of 201912 is about 58.6661214366. Note that the first 3 decimals are identical.

The spelling of 201912 in words is "two hundred one thousand, nine hundred twelve".