42123713 has 4 divisors (see below), whose sum is σ = 42344448. Its totient is φ = 41902980.

The previous prime is 42123691. The next prime is 42123721. The reversal of 42123713 is 31732124.

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 a de Polignac number, because none of the positive numbers 2^k-42123713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42123793) 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, 110081 + ... + 110462.

It is an arithmetic number, because the mean of its divisors is an integer number (10586112).

Almost surely, 2^42123713 is an apocalyptic number.

It is an amenable number.

42123713 is a deficient number, since it is larger than the sum of its proper divisors (220735).

42123713 is a wasteful number, since it uses less digits than its factorization.

42123713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220734.

The product of its digits is 1008, while the sum is 23.

The square root of 42123713 is about 6490.2783453408. The cubic root of 42123713 is about 347.9436233375.

Adding to 42123713 its reverse (31732124), we get a palindrome (73855837).

The spelling of 42123713 in words is "forty-two million, one hundred twenty-three thousand, seven hundred thirteen".