42042793 has 4 divisors (see below), whose sum is σ = 45276868. Its totient is φ = 38808720.

The previous prime is 42042743. The next prime is 42042809. The reversal of 42042793 is 39724024.

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 26337424 + 15705369 = 5132^2 + 3963^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42042793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42042703) 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, 1617018 + ... + 1617043.

It is an arithmetic number, because the mean of its divisors is an integer number (11319217).

Almost surely, 2^42042793 is an apocalyptic number.

It is an amenable number.

42042793 is a deficient number, since it is larger than the sum of its proper divisors (3234075).

42042793 is a wasteful number, since it uses less digits than its factorization.

42042793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234074.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 42042793 is about 6484.0414094915. The cubic root of 42042793 is about 347.7206796612.

The spelling of 42042793 in words is "forty-two million, forty-two thousand, seven hundred ninety-three".