131243 has 4 divisors (see below), whose sum is σ = 150000. Its totient is φ = 112488.

The previous prime is 131231. The next prime is 131249. The reversal of 131243 is 342131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131243 - 2⁸ = 130987 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 9368 + ... + 9381.

It is an arithmetic number, because the mean of its divisors is an integer number (37500).

2¹³¹²⁴³ is an apocalyptic number.

131243 is a deficient number, since it is larger than the sum of its proper divisors (18757).

131243 is an equidigital number, since it uses as much as digits as its factorization.

131243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18756.

The product of its digits is 72, while the sum is 14.

The square root of 131243 is about 362.2747576081. The cubic root of 131243 is about 50.8189143613.

Adding to 131243 its reverse (342131), we get a palindrome (473374).

The spelling of 131243 in words is "one hundred thirty-one thousand, two hundred forty-three".