131123 has 4 divisors (see below), whose sum is σ = 136848. Its totient is φ = 125400.

The previous prime is 131113. The next prime is 131129. The reversal of 131123 is 321131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321131 = 67 ⋅4793.

It is a cyclic number.

It is not a de Polignac number, because 131123 - 2⁶ = 131059 is a prime.

It is a super-2 number, since 2×131123² = 34386482258, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

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

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2828 + ... + 2873.

It is an arithmetic number, because the mean of its divisors is an integer number (34212).

2¹³¹¹²³ is an apocalyptic number.

131123 is a deficient number, since it is larger than the sum of its proper divisors (5725).

131123 is an equidigital number, since it uses as much as digits as its factorization.

131123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5724.

The product of its digits is 18, while the sum is 11.

The square root of 131123 is about 362.1090995819. The cubic root of 131123 is about 50.8034211431.

Adding to 131123 its reverse (321131), we get a palindrome (452254).

The spelling of 131123 in words is "one hundred thirty-one thousand, one hundred twenty-three".