42684885 has 24 divisors (see below), whose sum is σ = 74929920. Its totient is φ = 22475232.

The previous prime is 42684881. The next prime is 42684893. The reversal of 42684885 is 58848624.

42684885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42684885 - 2² = 42684881 is a prime.

It is a super-3 number, since 3×42684885³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42684885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42684881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2449 + ... + 9558.

It is an arithmetic number, because the mean of its divisors is an integer number (3122080).

Almost surely, 2^42684885 is an apocalyptic number.

42684885 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42684885 is a deficient number, since it is larger than the sum of its proper divisors (32245035).

42684885 is a wasteful number, since it uses less digits than its factorization.

42684885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12097 (or 12094 counting only the distinct ones).

The product of its digits is 491520, while the sum is 45.

The square root of 42684885 is about 6533.3670492327. The cubic root of 42684885 is about 349.4819137552.

The spelling of 42684885 in words is "forty-two million, six hundred eighty-four thousand, eight hundred eighty-five".