127568138 has 32 divisors (see below), whose sum is σ = 202078800. Its totient is φ = 60336640.

The previous prime is 127568123. The next prime is 127568159. The reversal of 127568138 is 831865721.

It can be written as a sum of positive squares in 8 ways, for example, as 55606849 + 71961289 = 7457^2 + 8483^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 127568095 and 127568104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647456 + ... + 647652.

Almost surely, 2^127568138 is an apocalyptic number.

127568138 is a deficient number, since it is larger than the sum of its proper divisors (74510662).

127568138 is a wasteful number, since it uses less digits than its factorization.

127568138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442.

The product of its digits is 80640, while the sum is 41.

The square root of 127568138 is about 11294.6065889875. The cubic root of 127568138 is about 503.4009979741.

The spelling of 127568138 in words is "one hundred twenty-seven million, five hundred sixty-eight thousand, one hundred thirty-eight".