125140109 has 2 divisors, whose sum is σ = 125140110. Its totient is φ = 125140108.

The previous prime is 125140073. The next prime is 125140123. The reversal of 125140109 is 901041521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122722084 + 2418025 = 11078^2 + 1555^2 .

It is a cyclic number.

It is not a de Polignac number, because 125140109 - 2²⁰ = 124091533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125140129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62570054 + 62570055.

It is an arithmetic number, because the mean of its divisors is an integer number (62570055).

Almost surely, 2^125140109 is an apocalyptic number.

It is an amenable number.

125140109 is a deficient number, since it is larger than the sum of its proper divisors (1).

125140109 is an equidigital number, since it uses as much as digits as its factorization.

125140109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 125140109 is about 11186.6039976393. The cubic root of 125140109 is about 500.1867422460.

The spelling of 125140109 in words is "one hundred twenty-five million, one hundred forty thousand, one hundred nine".