42124013 has 4 divisors (see below), whose sum is σ = 42533088. Its totient is φ = 41714940.

The previous prime is 42124003. The next prime is 42124057. The reversal of 42124013 is 31042124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42124013 - 2¹⁰ = 42122989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42123982 and 42124000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42124003) 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, 204383 + ... + 204588.

It is an arithmetic number, because the mean of its divisors is an integer number (10633272).

Almost surely, 2^42124013 is an apocalyptic number.

It is an amenable number.

42124013 is a deficient number, since it is larger than the sum of its proper divisors (409075).

42124013 is a wasteful number, since it uses less digits than its factorization.

42124013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409074.

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

The square root of 42124013 is about 6490.3014567892. The cubic root of 42124013 is about 347.9444493397.

Adding to 42124013 its reverse (31042124), we get a palindrome (73166137).

The spelling of 42124013 in words is "forty-two million, one hundred twenty-four thousand, thirteen".