124791 has 4 divisors (see below), whose sum is σ = 166392. Its totient is φ = 83192.

The previous prime is 124783. The next prime is 124793. The reversal of 124791 is 197421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 124791 - 2³ = 124783 is a prime.

It is a D-number.

124791 is a lucky 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 (124793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20796 + ... + 20801.

It is an arithmetic number, because the mean of its divisors is an integer number (41598).

2¹²⁴⁷⁹¹ is an apocalyptic number.

124791 is a deficient number, since it is larger than the sum of its proper divisors (41601).

124791 is an equidigital number, since it uses as much as digits as its factorization.

124791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41600.

The product of its digits is 504, while the sum is 24.

The square root of 124791 is about 353.2576963068. The cubic root of 124791 is about 49.9721177879.

The spelling of 124791 in words is "one hundred twenty-four thousand, seven hundred ninety-one".