285105121 has 8 divisors (see below), whose sum is σ = 326188224. Its totient is φ = 244110480.

The previous prime is 285105101. The next prime is 285105137. The reversal of 285105121 is 121501582.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285105121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285105101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15055 + ... + 28228.

It is an arithmetic number, because the mean of its divisors is an integer number (40773528).

Almost surely, 2^285105121 is an apocalyptic number.

It is an amenable number.

285105121 is a deficient number, since it is larger than the sum of its proper divisors (41083103).

285105121 is an equidigital number, since it uses as much as digits as its factorization.

285105121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44231.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 285105121 is about 16885.0561444136. The cubic root of 285105121 is about 658.1653370977.

The spelling of 285105121 in words is "two hundred eighty-five million, one hundred five thousand, one hundred twenty-one".