42042113 has 4 divisors (see below), whose sum is σ = 42057648. Its totient is φ = 42026580.

The previous prime is 42042109. The next prime is 42042151. The reversal of 42042113 is 31124024.

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 42042113 - 2² = 42042109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42042091 and 42042100.

It is not an unprimeable number, because it can be changed into a prime (42042103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2531 + ... + 9512.

It is an arithmetic number, because the mean of its divisors is an integer number (10514412).

Almost surely, 2^42042113 is an apocalyptic number.

It is an amenable number.

42042113 is a deficient number, since it is larger than the sum of its proper divisors (15535).

42042113 is a wasteful number, since it uses less digits than its factorization.

42042113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15534.

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

The square root of 42042113 is about 6483.9889728469. The cubic root of 42042113 is about 347.7188049734.

Adding to 42042113 its reverse (31124024), we get a palindrome (73166137).

The spelling of 42042113 in words is "forty-two million, forty-two thousand, one hundred thirteen".