124813 has 4 divisors (see below), whose sum is σ = 134428. Its totient is φ = 115200.

The previous prime is 124799. The next prime is 124819. The reversal of 124813 is 318421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318421 = 19 ⋅16759.

It can be written as a sum of positive squares in 2 ways, for example, as 56169 + 68644 = 237^2 + 262^2 .

It is a cyclic number.

It is not a de Polignac number, because 124813 - 2⁵ = 124781 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 (124819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4788 + ... + 4813.

It is an arithmetic number, because the mean of its divisors is an integer number (33607).

2¹²⁴⁸¹³ is an apocalyptic number.

124813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

124813 is a deficient number, since it is larger than the sum of its proper divisors (9615).

124813 is an equidigital number, since it uses as much as digits as its factorization.

124813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9614.

The product of its digits is 192, while the sum is 19.

The square root of 124813 is about 353.2888336758. The cubic root of 124813 is about 49.9750542229.

The spelling of 124813 in words is "one hundred twenty-four thousand, eight hundred thirteen".