127352016157421 has 36 divisors (see below), whose sum is σ = 144612979711956. Its totient is φ = 112061834311680.

The previous prime is 127352016157403. The next prime is 127352016157507. The reversal of 127352016157421 is 124751610253721.

It can be written as a sum of positive squares in 6 ways, for example, as 1037209849225 + 126314806308196 = 1018435^2 + 11238986^2 .

It is not a de Polignac number, because 127352016157421 - 2⁶ = 127352016157357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127352016157621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 29978531 + ... + 33961983.

It is an arithmetic number, because the mean of its divisors is an integer number (4017027214221).

Almost surely, 2^{127352016157421} is an apocalyptic number.

127352016157421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

127352016157421 is a deficient number, since it is larger than the sum of its proper divisors (17260963554535).

127352016157421 is a wasteful number, since it uses less digits than its factorization.

127352016157421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983742 (or 3983694 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 127352016157421 in words is "one hundred twenty-seven trillion, three hundred fifty-two billion, sixteen million, one hundred fifty-seven thousand, four hundred twenty-one".