131125717 has 2 divisors, whose sum is σ = 131125718. Its totient is φ = 131125716.

The previous prime is 131125703. The next prime is 131125727. The reversal of 131125717 is 717521131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116079076 + 15046641 = 10774^2 + 3879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131125717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131125727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65562858 + 65562859.

It is an arithmetic number, because the mean of its divisors is an integer number (65562859).

Almost surely, 2^131125717 is an apocalyptic number.

It is an amenable number.

131125717 is a deficient number, since it is larger than the sum of its proper divisors (1).

131125717 is an equidigital number, since it uses as much as digits as its factorization.

131125717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1470, while the sum is 28.

The square root of 131125717 is about 11451.0137979133. The cubic root of 131125717 is about 508.0377203995.

Adding to 131125717 its reverse (717521131), we get a palindrome (848646848).

It can be divided in two parts, 1311 and 25717, that added together give a triangular number (27028 = T₂₃₂).

The spelling of 131125717 in words is "one hundred thirty-one million, one hundred twenty-five thousand, seven hundred seventeen".