131251 has 2 divisors, whose sum is σ = 131252. Its totient is φ = 131250.

The previous prime is 131249. The next prime is 131267. The reversal of 131251 is 152131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131251 - 2¹ = 131249 is a prime.

Together with 131249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (131221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65625 + 65626.

It is an arithmetic number, because the mean of its divisors is an integer number (65626).

2¹³¹²⁵¹ is an apocalyptic number.

131251 is a deficient number, since it is larger than the sum of its proper divisors (1).

131251 is an equidigital number, since it uses as much as digits as its factorization.

131251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30, while the sum is 13.

The square root of 131251 is about 362.2857987832. The cubic root of 131251 is about 50.8199469066.

Adding to 131251 its reverse (152131), we get a palindrome (283382).

The spelling of 131251 in words is "one hundred thirty-one thousand, two hundred fifty-one".