124391 has 4 divisors (see below), whose sum is σ = 126792. Its totient is φ = 121992.

The previous prime is 124367. The next prime is 124427. The reversal of 124391 is 193421.

124391 is nontrivially palindromic in base 3.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193421 = 127 ⋅1523.

It is a cyclic number.

It is not a de Polignac number, because 124391 - 2¹⁴ = 108007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124301) 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, 1121 + ... + 1226.

It is an arithmetic number, because the mean of its divisors is an integer number (31698).

2¹²⁴³⁹¹ is an apocalyptic number.

124391 is a deficient number, since it is larger than the sum of its proper divisors (2401).

124391 is an equidigital number, since it uses as much as digits as its factorization.

124391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400.

The product of its digits is 216, while the sum is 20.

The square root of 124391 is about 352.6910829607. The cubic root of 124391 is about 49.9186677731.

It can be divided in two parts, 124 and 391, that multiplied together give a palindrome (48484).

The spelling of 124391 in words is "one hundred twenty-four thousand, three hundred ninety-one".