42885909 has 24 divisors (see below), whose sum is σ = 69840960. Its totient is φ = 25989480.

The previous prime is 42885901. The next prime is 42885911. The reversal of 42885909 is 90958824.

It is not a de Polignac number, because 42885909 - 2³ = 42885901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42885901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3297 + ... + 9830.

It is an arithmetic number, because the mean of its divisors is an integer number (2910040).

Almost surely, 2^42885909 is an apocalyptic number.

It is an amenable number.

42885909 is a deficient number, since it is larger than the sum of its proper divisors (26955051).

42885909 is a wasteful number, since it uses less digits than its factorization.

42885909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13158 (or 13141 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 42885909 is about 6548.7333889845. The cubic root of 42885909 is about 350.0296818365.

The spelling of 42885909 in words is "forty-two million, eight hundred eighty-five thousand, nine hundred nine".