124204013 has 4 divisors (see below), whose sum is σ = 128486940. Its totient is φ = 119921088.

The previous prime is 124204009. The next prime is 124204021. The reversal of 124204013 is 310402421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 100360324 + 23843689 = 10018^2 + 4883^2 .

It is a cyclic number.

It is not a de Polignac number, because 124204013 - 2² = 124204009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124203982 and 124204000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124206013) 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, 2141420 + ... + 2141477.

It is an arithmetic number, because the mean of its divisors is an integer number (32121735).

Almost surely, 2^124204013 is an apocalyptic number.

It is an amenable number.

124204013 is a deficient number, since it is larger than the sum of its proper divisors (4282927).

124204013 is an equidigital number, since it uses as much as digits as its factorization.

124204013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282926.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 124204013 is about 11144.6854150308. The cubic root of 124204013 is about 498.9364232130.

Adding to 124204013 its reverse (310402421), we get a palindrome (434606434).

The spelling of 124204013 in words is "one hundred twenty-four million, two hundred four thousand, thirteen".