131139 has 10 divisors (see below), whose sum is σ = 196020. Its totient is φ = 87372.

The previous prime is 131129. The next prime is 131143. The reversal of 131139 is 931131.

It is not a de Polignac number, because 131139 - 2⁷ = 131011 is a prime.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

131139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (131129) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 729 + ... + 890.

It is an arithmetic number, because the mean of its divisors is an integer number (19602).

2¹³¹¹³⁹ is an apocalyptic number.

131139 is a deficient number, since it is larger than the sum of its proper divisors (64881).

131139 is an equidigital number, since it uses as much as digits as its factorization.

131139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1622 counting only the distinct ones).

The product of its digits is 81, while the sum is 18.

The square root of 131139 is about 362.1311916972. The cubic root of 131139 is about 50.8054874515.

The spelling of 131139 in words is "one hundred thirty-one thousand, one hundred thirty-nine".