127745005 has 4 divisors (see below), whose sum is σ = 153294012. Its totient is φ = 102196000.

The previous prime is 127744997. The next prime is 127745011. The reversal of 127745005 is 500547721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44916804 + 82828201 = 6702^2 + 9101^2 .

It is not a de Polignac number, because 127745005 - 2³ = 127744997 is a prime.

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 a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12774496 + ... + 12774505.

It is an arithmetic number, because the mean of its divisors is an integer number (38323503).

Almost surely, 2^127745005 is an apocalyptic number.

It is an amenable number.

127745005 is a deficient number, since it is larger than the sum of its proper divisors (25549007).

127745005 is an equidigital number, since it uses as much as digits as its factorization.

127745005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25549006.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 127745005 is about 11302.4335875067. The cubic root of 127745005 is about 503.6335375141.

The spelling of 127745005 in words is "one hundred twenty-seven million, seven hundred forty-five thousand, five".