127851121 has 2 divisors, whose sum is σ = 127851122. Its totient is φ = 127851120.

The previous prime is 127851103. The next prime is 127851131. The reversal of 127851121 is 121158721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127441521 + 409600 = 11289^2 + 640^2 .

It is an emirp because it is prime and its reverse (121158721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127851121 - 2⁹ = 127850609 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127851121.

It is not a weakly prime, because it can be changed into another prime (127851131) 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, 63925560 + 63925561.

It is an arithmetic number, because the mean of its divisors is an integer number (63925561).

Almost surely, 2^127851121 is an apocalyptic number.

It is an amenable number.

127851121 is a deficient number, since it is larger than the sum of its proper divisors (1).

127851121 is an equidigital number, since it uses as much as digits as its factorization.

127851121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 28.

The square root of 127851121 is about 11307.1270002596. The cubic root of 127851121 is about 503.7729527108.

The spelling of 127851121 in words is "one hundred twenty-seven million, eight hundred fifty-one thousand, one hundred twenty-one".