42569289 has 36 divisors (see below), whose sum is σ = 72452016. Its totient is φ = 24011568.

The previous prime is 42569287. The next prime is 42569339. The reversal of 42569289 is 98296524.

42569289 is a `hidden beast` number, since 4 + 2 + 569 + 2 + 89 = 666.

It is not a de Polignac number, because 42569289 - 2¹ = 42569287 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42569287) 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 35 ways as a sum of consecutive naturals, for example, 36022 + ... + 37184.

It is an arithmetic number, because the mean of its divisors is an integer number (2012556).

Almost surely, 2^42569289 is an apocalyptic number.

42569289 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

42569289 is a deficient number, since it is larger than the sum of its proper divisors (29882727).

42569289 is a wasteful number, since it uses less digits than its factorization.

42569289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266 (or 1256 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 42569289 is about 6524.5144646939. The cubic root of 42569289 is about 349.1661483149.

The spelling of 42569289 in words is "forty-two million, five hundred sixty-nine thousand, two hundred eighty-nine".