127861 has 4 divisors (see below), whose sum is σ = 132300. Its totient is φ = 123424.

The previous prime is 127859. The next prime is 127867. The reversal of 127861 is 168721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168721 = 7 ⋅24103.

It can be written as a sum of positive squares in 2 ways, for example, as 34225 + 93636 = 185^2 + 306^2 .

It is not a de Polignac number, because 127861 - 2¹ = 127859 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 (127867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2176 + ... + 2233.

It is an arithmetic number, because the mean of its divisors is an integer number (33075).

2¹²⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

127861 is a deficient number, since it is larger than the sum of its proper divisors (4439).

127861 is an equidigital number, since it uses as much as digits as its factorization.

127861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4438.

The product of its digits is 672, while the sum is 25.

The square root of 127861 is about 357.5765652276. The cubic root of 127861 is about 50.3785927815.

The spelling of 127861 in words is "one hundred twenty-seven thousand, eight hundred sixty-one".