131270261 has 2 divisors, whose sum is σ = 131270262. Its totient is φ = 131270260.

The previous prime is 131270207. The next prime is 131270287. The reversal of 131270261 is 162072131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67749361 + 63520900 = 8231^2 + 7970^2 .

It is a cyclic number.

It is not a de Polignac number, because 131270261 - 2¹⁸ = 131008117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131270291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65635130 + 65635131.

It is an arithmetic number, because the mean of its divisors is an integer number (65635131).

Almost surely, 2^131270261 is an apocalyptic number.

It is an amenable number.

131270261 is a deficient number, since it is larger than the sum of its proper divisors (1).

131270261 is an equidigital number, since it uses as much as digits as its factorization.

131270261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 131270261 is about 11457.3234658013. The cubic root of 131270261 is about 508.2243271655.

The spelling of 131270261 in words is "one hundred thirty-one million, two hundred seventy thousand, two hundred sixty-one".