124765 has 4 divisors (see below), whose sum is σ = 149724. Its totient is φ = 99808.

The previous prime is 124759. The next prime is 124769. The reversal of 124765 is 567421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 567421 = 107 ⋅5303.

It can be written as a sum of positive squares in 2 ways, for example, as 68121 + 56644 = 261^2 + 238^2 .

It is a cyclic number.

It is not a de Polignac number, because 124765 - 2¹⁵ = 91997 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124769) 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, 12472 + ... + 12481.

It is an arithmetic number, because the mean of its divisors is an integer number (37431).

2¹²⁴⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

124765 is a deficient number, since it is larger than the sum of its proper divisors (24959).

124765 is an equidigital number, since it uses as much as digits as its factorization.

124765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24958.

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

The square root of 124765 is about 353.2208940592. The cubic root of 124765 is about 49.9686470106.

The spelling of 124765 in words is "one hundred twenty-four thousand, seven hundred sixty-five".