42569819 has 8 divisors (see below), whose sum is σ = 45133200. Its totient is φ = 40013056.

The previous prime is 42569801. The next prime is 42569831. The reversal of 42569819 is 91896524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42569819 - 2⁸ = 42569563 is a prime.

It is a super-2 number, since 2×42569819² = 3624378979385522, which contains 22 as substring.

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 42569819.

It is not an unprimeable number, because it can be changed into a prime (42565819) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 19232 + ... + 21330.

It is an arithmetic number, because the mean of its divisors is an integer number (5641650).

Almost surely, 2^42569819 is an apocalyptic number.

42569819 is a deficient number, since it is larger than the sum of its proper divisors (2563381).

42569819 is a wasteful number, since it uses less digits than its factorization.

42569819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3309.

The product of its digits is 155520, while the sum is 44.

The square root of 42569819 is about 6524.5550806166. Note that the first 3 decimals coincide. The cubic root of 42569819 is about 349.1675973822.

The spelling of 42569819 in words is "forty-two million, five hundred sixty-nine thousand, eight hundred nineteen".