127865 has 8 divisors (see below), whose sum is σ = 155520. Its totient is φ = 100912.

The previous prime is 127859. The next prime is 127867. The reversal of 127865 is 568721.

127865 = T₁₂₃ + T₁₂₄ + ... + T₁₃₇.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127865 - 2⁴ = 127849 is a prime.

It is a d-powerful number, because it can be written as 1 + 2⁷ + 8⁵ + 7⁵ + 6² + 5⁷ .

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 7 ways as a sum of consecutive naturals, for example, 416 + ... + 654.

It is an arithmetic number, because the mean of its divisors is an integer number (19440).

2¹²⁷⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

127865 is a deficient number, since it is larger than the sum of its proper divisors (27655).

127865 is a wasteful number, since it uses less digits than its factorization.

127865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351.

The product of its digits is 3360, while the sum is 29.

The square root of 127865 is about 357.5821583916. The cubic root of 127865 is about 50.3791181235.

The spelling of 127865 in words is "one hundred twenty-seven thousand, eight hundred sixty-five".