125386109 has 2 divisors, whose sum is σ = 125386110. Its totient is φ = 125386108.

The previous prime is 125386097. The next prime is 125386189. The reversal of 125386109 is 901683521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120934009 + 4452100 = 10997^2 + 2110^2 .

It is a cyclic number.

It is not a de Polignac number, because 125386109 - 2¹² = 125382013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125386189) 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, 62693054 + 62693055.

It is an arithmetic number, because the mean of its divisors is an integer number (62693055).

Almost surely, 2^125386109 is an apocalyptic number.

It is an amenable number.

125386109 is a deficient number, since it is larger than the sum of its proper divisors (1).

125386109 is an equidigital number, since it uses as much as digits as its factorization.

125386109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 125386109 is about 11197.5938933326. The cubic root of 125386109 is about 500.5142828449.

The spelling of 125386109 in words is "one hundred twenty-five million, three hundred eighty-six thousand, one hundred nine".