42556285 has 8 divisors (see below), whose sum is σ = 51288120. Its totient is φ = 33897984.

The previous prime is 42556277. The next prime is 42556289. The reversal of 42556285 is 58265524.

It can be written as a sum of positive squares in 4 ways, for example, as 3755844 + 38800441 = 1938^2 + 6229^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42556285 - 2³ = 42556277 is a prime.

It is a super-2 number, since 2×42556285² = 3622074786002450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42556289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17100 + ... + 19429.

It is an arithmetic number, because the mean of its divisors is an integer number (6411015).

Almost surely, 2^42556285 is an apocalyptic number.

It is an amenable number.

42556285 is a deficient number, since it is larger than the sum of its proper divisors (8731835).

42556285 is a wasteful number, since it uses less digits than its factorization.

42556285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36767.

The product of its digits is 96000, while the sum is 37.

The square root of 42556285 is about 6523.5178393257. The cubic root of 42556285 is about 349.1305904505.

The spelling of 42556285 in words is "forty-two million, five hundred fifty-six thousand, two hundred eighty-five".