125305903 has 2 divisors, whose sum is σ = 125305904. Its totient is φ = 125305902.

The previous prime is 125305877. The next prime is 125305919. The reversal of 125305903 is 309503521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125305903 - 2²¹ = 123208751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125305933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62652951 + 62652952.

It is an arithmetic number, because the mean of its divisors is an integer number (62652952).

Almost surely, 2^125305903 is an apocalyptic number.

125305903 is a deficient number, since it is larger than the sum of its proper divisors (1).

125305903 is an equidigital number, since it uses as much as digits as its factorization.

125305903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 125305903 is about 11194.0119260254. The cubic root of 125305903 is about 500.4075384013.

The spelling of 125305903 in words is "one hundred twenty-five million, three hundred five thousand, nine hundred three".