201906 has 16 divisors (see below), whose sum is σ = 448800. Its totient is φ = 67284.

The previous prime is 201893. The next prime is 201907. The reversal of 201906 is 609102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (201907) by changing a digit.

201906 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, 1816 + ... + 1923.

It is an arithmetic number, because the mean of its divisors is an integer number (28050).

2²⁰¹⁹⁰⁶ is an apocalyptic number.

201906 is an abundant number, since it is smaller than the sum of its proper divisors (246894).

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

201906 is a wasteful number, since it uses less digits than its factorization.

201906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750 (or 3744 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 201906 is about 449.3395152888. The cubic root of 201906 is about 58.6655403250.

It can be divided in two parts, 201 and 906, that multiplied together give a triangular number (182106 = T₆₀₃).

The spelling of 201906 in words is "two hundred one thousand, nine hundred six".