42817042 has 4 divisors (see below), whose sum is σ = 64225566. Its totient is φ = 21408520.

The previous prime is 42817009. The next prime is 42817063. The reversal of 42817042 is 24071824.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 30349081 + 12467961 = 5509^2 + 3531^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42817042.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10704259 + ... + 10704262.

Almost surely, 2^42817042 is an apocalyptic number.

42817042 is a deficient number, since it is larger than the sum of its proper divisors (21408524).

42817042 is a wasteful number, since it uses less digits than its factorization.

42817042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21408523.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 42817042 is about 6543.4732367451. The cubic root of 42817042 is about 349.8422200400.

Adding to 42817042 its reverse (24071824), we get a palindrome (66888866).

The spelling of 42817042 in words is "forty-two million, eight hundred seventeen thousand, forty-two".