131289 has 8 divisors (see below), whose sum is σ = 177120. Its totient is φ = 86496.

The previous prime is 131267. The next prime is 131293. The reversal of 131289 is 982131.

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

It is a de Polignac number, because none of the positive numbers 2^k-131289 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (131249) 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, 117 + ... + 525.

It is an arithmetic number, because the mean of its divisors is an integer number (22140).

2¹³¹²⁸⁹ is an apocalyptic number.

It is an amenable number.

131289 is a deficient number, since it is larger than the sum of its proper divisors (45831).

131289 is a wasteful number, since it uses less digits than its factorization.

131289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519.

The product of its digits is 432, while the sum is 24.

The square root of 131289 is about 362.3382397705. The cubic root of 131289 is about 50.8248509242.

The spelling of 131289 in words is "one hundred thirty-one thousand, two hundred eighty-nine".