42243775 has 12 divisors (see below), whose sum is σ = 59865712. Its totient is φ = 28967040.

The previous prime is 42243757. The next prime is 42243779. The reversal of 42243775 is 57734224.

It is not a de Polignac number, because 42243775 - 2⁵ = 42243743 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42243775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42243779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120522 + ... + 120871.

Almost surely, 2^42243775 is an apocalyptic number.

42243775 is a deficient number, since it is larger than the sum of its proper divisors (17621937).

42243775 is a wasteful number, since it uses less digits than its factorization.

42243775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241410 (or 241405 counting only the distinct ones).

The product of its digits is 47040, while the sum is 34.

The square root of 42243775 is about 6499.5211362069. The cubic root of 42243775 is about 348.2738821386.

Adding to 42243775 its reverse (57734224), we get a palindrome (99977999).

The spelling of 42243775 in words is "forty-two million, two hundred forty-three thousand, seven hundred seventy-five".