126142502309 has 2 divisors, whose sum is σ = 126142502310. Its totient is φ = 126142502308.

The previous prime is 126142502293. The next prime is 126142502327. The reversal of 126142502309 is 903205241621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113306292100 + 12836210209 = 336610^2 + 113297^2 .

It is an emirp because it is prime and its reverse (903205241621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126142502309 - 2⁴ = 126142502293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126142502399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63071251154 + 63071251155.

It is an arithmetic number, because the mean of its divisors is an integer number (63071251155).

Almost surely, 2^126142502309 is an apocalyptic number.

It is an amenable number.

126142502309 is a deficient number, since it is larger than the sum of its proper divisors (1).

126142502309 is an equidigital number, since it uses as much as digits as its factorization.

126142502309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 126142502309 in words is "one hundred twenty-six billion, one hundred forty-two million, five hundred two thousand, three hundred nine".