127645 has 12 divisors (see below), whose sum is σ = 178524. Its totient is φ = 87360.

The previous prime is 127643. The next prime is 127649. The reversal of 127645 is 546721.

It can be written as a sum of positive squares in 2 ways, for example, as 41209 + 86436 = 203^2 + 294^2 .

It is not a de Polignac number, because 127645 - 2¹ = 127643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16 + ... + 505.

It is an arithmetic number, because the mean of its divisors is an integer number (14877).

2¹²⁷⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

127645 is a deficient number, since it is larger than the sum of its proper divisors (50879).

127645 is an equidigital number, since it uses as much as digits as its factorization.

127645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 533 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 127645 is about 357.2744043449. The cubic root of 127645 is about 50.3502080266.

It can be divided in two parts, 12764 and 5, that added together give a square (12769 = 113²).

The spelling of 127645 in words is "one hundred twenty-seven thousand, six hundred forty-five".