127072420402 has 4 divisors (see below), whose sum is σ = 190608630606. Its totient is φ = 63536210200.

The previous prime is 127072420379. The next prime is 127072420421. The reversal of 127072420402 is 204024270721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 110642051641 + 16430368761 = 332629^2 + 128181^2 .

It is a super-2 number, since 2×127072420402² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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, 31768105099 + ... + 31768105102.

Almost surely, 2^127072420402 is an apocalyptic number.

127072420402 is a deficient number, since it is larger than the sum of its proper divisors (63536210204).

127072420402 is an equidigital number, since it uses as much as digits as its factorization.

127072420402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63536210203.

The product of its (nonzero) digits is 12544, while the sum is 31.

The spelling of 127072420402 in words is "one hundred twenty-seven billion, seventy-two million, four hundred twenty thousand, four hundred two".