201489 has 8 divisors (see below), whose sum is σ = 274560. Its totient is φ = 131376.

The previous prime is 201473. The next prime is 201491. The reversal of 201489 is 984102.

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

It is not a de Polignac number, because 201489 - 2⁴ = 201473 is a prime.

201489 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 201489.

It is not an unprimeable number, because it can be changed into a prime (201449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 574 + ... + 855.

It is an arithmetic number, because the mean of its divisors is an integer number (34320).

2²⁰¹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

201489 is a deficient number, since it is larger than the sum of its proper divisors (73071).

201489 is a wasteful number, since it uses less digits than its factorization.

201489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 201489 is about 448.8752610693. The cubic root of 201489 is about 58.6251248325.

It can be divided in two parts, 201 and 489, that multiplied together give a palindrome (98289).

The spelling of 201489 in words is "two hundred one thousand, four hundred eighty-nine".