125317861 has 2 divisors, whose sum is σ = 125317862. Its totient is φ = 125317860.

The previous prime is 125317849. The next prime is 125317891. The reversal of 125317861 is 168713521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125216100 + 101761 = 11190^2 + 319^2 .

It is a cyclic number.

It is not a de Polignac number, because 125317861 - 2⁷ = 125317733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125317891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62658930 + 62658931.

It is an arithmetic number, because the mean of its divisors is an integer number (62658931).

Almost surely, 2^125317861 is an apocalyptic number.

It is an amenable number.

125317861 is a deficient number, since it is larger than the sum of its proper divisors (1).

125317861 is an equidigital number, since it uses as much as digits as its factorization.

125317861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 125317861 is about 11194.5460381384. The cubic root of 125317861 is about 500.4234559356.

The spelling of 125317861 in words is "one hundred twenty-five million, three hundred seventeen thousand, eight hundred sixty-one".