126252513889 has 2 divisors, whose sum is σ = 126252513890. Its totient is φ = 126252513888.

The previous prime is 126252513883. The next prime is 126252513901. The reversal of 126252513889 is 988315252621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124118813025 + 2133700864 = 352305^2 + 46192^2 .

It is an emirp because it is prime and its reverse (988315252621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126252513889 - 2¹¹ = 126252511841 is a prime.

It is not a weakly prime, because it can be changed into another prime (126252513883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63126256944 + 63126256945.

It is an arithmetic number, because the mean of its divisors is an integer number (63126256945).

Almost surely, 2^126252513889 is an apocalyptic number.

It is an amenable number.

126252513889 is a deficient number, since it is larger than the sum of its proper divisors (1).

126252513889 is an equidigital number, since it uses as much as digits as its factorization.

126252513889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2073600, while the sum is 52.

The spelling of 126252513889 in words is "one hundred twenty-six billion, two hundred fifty-two million, five hundred thirteen thousand, eight hundred eighty-nine".