42124613 has 4 divisors (see below), whose sum is σ = 42288780. Its totient is φ = 41960448.

The previous prime is 42124609. The next prime is 42124619. The reversal of 42124613 is 31642124.

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 34845409 + 7279204 = 5903^2 + 2698^2 .

It is a cyclic number.

It is not a de Polignac number, because 42124613 - 2² = 42124609 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 (42124619) 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, 81698 + ... + 82211.

It is an arithmetic number, because the mean of its divisors is an integer number (10572195).

Almost surely, 2^42124613 is an apocalyptic number.

It is an amenable number.

42124613 is a deficient number, since it is larger than the sum of its proper divisors (164167).

42124613 is a wasteful number, since it uses less digits than its factorization.

42124613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164166.

The product of its digits is 1152, while the sum is 23.

The square root of 42124613 is about 6490.3476794391. The cubic root of 42124613 is about 347.9461013324.

Adding to 42124613 its reverse (31642124), we get a palindrome (73766737).

The spelling of 42124613 in words is "forty-two million, one hundred twenty-four thousand, six hundred thirteen".