124865 has 16 divisors (see below), whose sum is σ = 172368. Its totient is φ = 86016.

The previous prime is 124853. The next prime is 124897. The reversal of 124865 is 568421.

It can be written as a sum of positive squares in 8 ways, for example, as 23104 + 101761 = 152^2 + 319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124865 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1049 + ... + 1161.

It is an arithmetic number, because the mean of its divisors is an integer number (10773).

2¹²⁴⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

124865 is a deficient number, since it is larger than the sum of its proper divisors (47503).

124865 is a wasteful number, since it uses less digits than its factorization.

124865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148.

The product of its digits is 1920, while the sum is 26.

The square root of 124865 is about 353.3624201864. The cubic root of 124865 is about 49.9819935161.

Subtracting 124865 from its reverse (568421), we obtain a square (443556 = 666²).

It can be divided in two parts, 124 and 865, that added together give a palindrome (989).

The spelling of 124865 in words is "one hundred twenty-four thousand, eight hundred sixty-five".