131170261 has 2 divisors, whose sum is σ = 131170262. Its totient is φ = 131170260.

The previous prime is 131170241. The next prime is 131170289. The reversal of 131170261 is 162071131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110649361 + 20520900 = 10519^2 + 4530^2 .

It is a cyclic number.

It is not a de Polignac number, because 131170261 - 2⁵ = 131170229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131170201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65585130 + 65585131.

It is an arithmetic number, because the mean of its divisors is an integer number (65585131).

Almost surely, 2^131170261 is an apocalyptic number.

It is an amenable number.

131170261 is a deficient number, since it is larger than the sum of its proper divisors (1).

131170261 is an equidigital number, since it uses as much as digits as its factorization.

131170261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 131170261 is about 11452.9586133889. The cubic root of 131170261 is about 508.0952414582.

The spelling of 131170261 in words is "one hundred thirty-one million, one hundred seventy thousand, two hundred sixty-one".