127569138 has 16 divisors (see below), whose sum is σ = 255251520. Its totient is φ = 42504176.

The previous prime is 127569133. The next prime is 127569187. The reversal of 127569138 is 831965721.

It is a self number, because there is not a number n which added to its sum of digits gives 127569138.

It is not an unprimeable number, because it can be changed into a prime (127569133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19456 + ... + 25172.

It is an arithmetic number, because the mean of its divisors is an integer number (15953220).

Almost surely, 2^127569138 is an apocalyptic number.

127569138 is an abundant number, since it is smaller than the sum of its proper divisors (127682382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127569138 is a wasteful number, since it uses less digits than its factorization.

127569138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9441.

The product of its digits is 90720, while the sum is 42.

The square root of 127569138 is about 11294.6508578176. The cubic root of 127569138 is about 503.4023133487.

The spelling of 127569138 in words is "one hundred twenty-seven million, five hundred sixty-nine thousand, one hundred thirty-eight".