125025243509 has 2 divisors, whose sum is σ = 125025243510. Its totient is φ = 125025243508.

The previous prime is 125025243493. The next prime is 125025243521. The reversal of 125025243509 is 905342520521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104990256484 + 20034987025 = 324022^2 + 141545^2 .

It is a cyclic number.

It is not a de Polignac number, because 125025243509 - 2⁴ = 125025243493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125025249509) 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, 62512621754 + 62512621755.

It is an arithmetic number, because the mean of its divisors is an integer number (62512621755).

Almost surely, 2^125025243509 is an apocalyptic number.

It is an amenable number.

125025243509 is a deficient number, since it is larger than the sum of its proper divisors (1).

125025243509 is an equidigital number, since it uses as much as digits as its factorization.

125025243509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 125025243509 in words is "one hundred twenty-five billion, twenty-five million, two hundred forty-three thousand, five hundred nine".