125818871 has 2 divisors, whose sum is σ = 125818872. Its totient is φ = 125818870.

The previous prime is 125818867. The next prime is 125818897. The reversal of 125818871 is 178818521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125818871 - 2² = 125818867 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125818811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62909435 + 62909436.

It is an arithmetic number, because the mean of its divisors is an integer number (62909436).

Almost surely, 2^125818871 is an apocalyptic number.

125818871 is a deficient number, since it is larger than the sum of its proper divisors (1).

125818871 is an equidigital number, since it uses as much as digits as its factorization.

125818871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35840, while the sum is 41.

The square root of 125818871 is about 11216.9011317743. The cubic root of 125818871 is about 501.0894524626.

The spelling of 125818871 in words is "one hundred twenty-five million, eight hundred eighteen thousand, eight hundred seventy-one".