285224042 has 4 divisors (see below), whose sum is σ = 427836066. Its totient is φ = 142612020.

The previous prime is 285224041. The next prime is 285224047. The reversal of 285224042 is 240422582.

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

It can be written as a sum of positive squares in only one way, i.e., 194574601 + 90649441 = 13949^2 + 9521^2 .

It is a junction number, because it is equal to n+sod(n) for n = 285223996 and 285224014.

It is not an unprimeable number, because it can be changed into a prime (285224041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71306009 + ... + 71306012.

Almost surely, 2^285224042 is an apocalyptic number.

285224042 is a deficient number, since it is larger than the sum of its proper divisors (142612024).

285224042 is a wasteful number, since it uses less digits than its factorization.

285224042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142612023.

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 285224042 is about 16888.5772639379. The cubic root of 285224042 is about 658.2568341098.

The spelling of 285224042 in words is "two hundred eighty-five million, two hundred twenty-four thousand, forty-two".