42688285 has 4 divisors (see below), whose sum is σ = 51225948. Its totient is φ = 34150624.

The previous prime is 42688279. The next prime is 42688297. The reversal of 42688285 is 58288624.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28708164 + 13980121 = 5358^2 + 3739^2 .

It is a cyclic number.

It is not a de Polignac number, because 42688285 - 2³ = 42688277 is a prime.

It is a super-3 number, since 3×42688285³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4268824 + ... + 4268833.

It is an arithmetic number, because the mean of its divisors is an integer number (12806487).

Almost surely, 2^42688285 is an apocalyptic number.

It is an amenable number.

42688285 is a deficient number, since it is larger than the sum of its proper divisors (8537663).

42688285 is an equidigital number, since it uses as much as digits as its factorization.

42688285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8537662.

The product of its digits is 245760, while the sum is 43.

The square root of 42688285 is about 6533.6272467903. The cubic root of 42688285 is about 349.4911926600.

The spelling of 42688285 in words is "forty-two million, six hundred eighty-eight thousand, two hundred eighty-five".