285142241 has 4 divisors (see below), whose sum is σ = 301915332. Its totient is φ = 268369152.

The previous prime is 285142229. The next prime is 285142259. The reversal of 285142241 is 142241582.

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 139240000 + 145902241 = 11800^2 + 12079^2 .

It is a cyclic number.

It is not a de Polignac number, because 285142241 - 2¹⁰ = 285141217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285142541) 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 3 ways as a sum of consecutive naturals, for example, 8386520 + ... + 8386553.

It is an arithmetic number, because the mean of its divisors is an integer number (75478833).

Almost surely, 2^285142241 is an apocalyptic number.

It is an amenable number.

285142241 is a deficient number, since it is larger than the sum of its proper divisors (16773091).

285142241 is a wasteful number, since it uses less digits than its factorization.

285142241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16773090.

The product of its digits is 5120, while the sum is 29.

The square root of 285142241 is about 16886.1553054566. The cubic root of 285142241 is about 658.1938997053.

The spelling of 285142241 in words is "two hundred eighty-five million, one hundred forty-two thousand, two hundred forty-one".