125270861 has 2 divisors, whose sum is σ = 125270862. Its totient is φ = 125270860.

The previous prime is 125270851. The next prime is 125270891. The reversal of 125270861 is 168072521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117397225 + 7873636 = 10835^2 + 2806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125270861 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125270801) 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, 62635430 + 62635431.

It is an arithmetic number, because the mean of its divisors is an integer number (62635431).

Almost surely, 2^125270861 is an apocalyptic number.

It is an amenable number.

125270861 is a deficient number, since it is larger than the sum of its proper divisors (1).

125270861 is an equidigital number, since it uses as much as digits as its factorization.

125270861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 125270861 is about 11192.4466047420. The cubic root of 125270861 is about 500.3608874578.

The spelling of 125270861 in words is "one hundred twenty-five million, two hundred seventy thousand, eight hundred sixty-one".