131247 has 8 divisors (see below), whose sum is σ = 194480. Its totient is φ = 87480.

The previous prime is 131231. The next prime is 131249. The reversal of 131247 is 742131.

It is not a de Polignac number, because 131247 - 2⁴ = 131231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2404 + ... + 2457.

It is an arithmetic number, because the mean of its divisors is an integer number (24310).

2¹³¹²⁴⁷ is an apocalyptic number.

131247 is a deficient number, since it is larger than the sum of its proper divisors (63233).

131247 is an equidigital number, since it uses as much as digits as its factorization.

131247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4870 (or 4864 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 131247 is about 362.2802782377. The cubic root of 131247 is about 50.8194306392.

Adding to 131247 its reverse (742131), we get a palindrome (873378).

It can be divided in two parts, 13124 and 7, that added together give a palindrome (13131).

The spelling of 131247 in words is "one hundred thirty-one thousand, two hundred forty-seven".