42905285 has 8 divisors (see below), whose sum is σ = 51757056. Its totient is φ = 34143760.

The previous prime is 42905279. The next prime is 42905321. The reversal of 42905285 is 58250924.

It is a happy number.

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

It is not a de Polignac number, because 42905285 - 2⁸ = 42905029 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 21509 + ... + 23418.

It is an arithmetic number, because the mean of its divisors is an integer number (6469632).

Almost surely, 2^42905285 is an apocalyptic number.

It is an amenable number.

42905285 is a deficient number, since it is larger than the sum of its proper divisors (8851771).

42905285 is a wasteful number, since it uses less digits than its factorization.

42905285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45123.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 42905285 is about 6550.2125919698. The cubic root of 42905285 is about 350.0823887677.

The spelling of 42905285 in words is "forty-two million, nine hundred five thousand, two hundred eighty-five".