125013040309 has 2 divisors, whose sum is σ = 125013040310. Its totient is φ = 125013040308.

The previous prime is 125013040259. The next prime is 125013040379. The reversal of 125013040309 is 903040310521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88474717809 + 36538322500 = 297447^2 + 191150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125013040309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125013040379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62506520154 + 62506520155.

It is an arithmetic number, because the mean of its divisors is an integer number (62506520155).

Almost surely, 2^125013040309 is an apocalyptic number.

It is an amenable number.

125013040309 is a deficient number, since it is larger than the sum of its proper divisors (1).

125013040309 is an equidigital number, since it uses as much as digits as its factorization.

125013040309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 125013040309 in words is "one hundred twenty-five billion, thirteen million, forty thousand, three hundred nine".