42257793 has 4 divisors (see below), whose sum is σ = 56343728. Its totient is φ = 28171860.

The previous prime is 42257753. The next prime is 42257797. The reversal of 42257793 is 39775224.

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 not a de Polignac number, because 42257793 - 2¹⁰ = 42256769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42257797) 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, 7042963 + ... + 7042968.

It is an arithmetic number, because the mean of its divisors is an integer number (14085932).

Almost surely, 2^42257793 is an apocalyptic number.

It is an amenable number.

42257793 is a deficient number, since it is larger than the sum of its proper divisors (14085935).

42257793 is a wasteful number, since it uses less digits than its factorization.

42257793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14085934.

The product of its digits is 105840, while the sum is 39.

The square root of 42257793 is about 6500.5994338984. The cubic root of 42257793 is about 348.3124011342.

The spelling of 42257793 in words is "forty-two million, two hundred fifty-seven thousand, seven hundred ninety-three".