727665 has 16 divisors (see below), whose sum is σ = 1176000. Its totient is φ = 384192.

The previous prime is 727633. The next prime is 727667. The reversal of 727665 is 566727.

727665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 727665 - 2⁵ = 727633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (727667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1911 + ... + 2259.

It is an arithmetic number, because the mean of its divisors is an integer number (73500).

2⁷²⁷⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

727665 is a deficient number, since it is larger than the sum of its proper divisors (448335).

727665 is a wasteful number, since it uses less digits than its factorization.

727665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496.

The product of its digits is 17640, while the sum is 33.

The square root of 727665 is about 853.0328246908. The cubic root of 727665 is about 89.9450281585.

It can be divided in two parts, 72766 and 5, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 727665 in words is "seven hundred twenty-seven thousand, six hundred sixty-five".