127543840042 has 8 divisors (see below), whose sum is σ = 202569628356. Its totient is φ = 60020630592.

The previous prime is 127543840031. The next prime is 127543840139. The reversal of 127543840042 is 240048345721.

It can be written as a sum of positive squares in 2 ways, for example, as 126173433681 + 1370406361 = 355209^2 + 37019^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×127543840042² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 127543839977 and 127543840004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1875644673 + ... + 1875644740.

Almost surely, 2^127543840042 is an apocalyptic number.

127543840042 is a deficient number, since it is larger than the sum of its proper divisors (75025788314).

127543840042 is a wasteful number, since it uses less digits than its factorization.

127543840042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751289432.

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 127543840042 in words is "one hundred twenty-seven billion, five hundred forty-three million, eight hundred forty thousand, forty-two".