131128 has 16 divisors (see below), whose sum is σ = 253080. Its totient is φ = 63648.

The previous prime is 131113. The next prime is 131129. The reversal of 131128 is 821131.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 75 + ... + 517.

2¹³¹¹²⁸ is an apocalyptic number.

It is an amenable number.

131128 is a deficient number, since it is larger than the sum of its proper divisors (121952).

131128 is a wasteful number, since it uses less digits than its factorization.

131128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 482 counting only the distinct ones).

The product of its digits is 48, while the sum is 16.

The square root of 131128 is about 362.1160035127. The cubic root of 131128 is about 50.8040668825.

Adding to 131128 its reverse (821131), we get a palindrome (952259).

The spelling of 131128 in words is "one hundred thirty-one thousand, one hundred twenty-eight".