285542 has 4 divisors (see below), whose sum is σ = 428316. Its totient is φ = 142770.

The previous prime is 285539. The next prime is 285553. The reversal of 285542 is 245582.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285542.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71384 + ... + 71387.

It is an arithmetic number, because the mean of its divisors is an integer number (107079).

2²⁸⁵⁵⁴² is an apocalyptic number.

285542 is a deficient number, since it is larger than the sum of its proper divisors (142774).

285542 is a wasteful number, since it uses less digits than its factorization.

285542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142773.

The product of its digits is 3200, while the sum is 26.

The square root of 285542 is about 534.3613009940. The cubic root of 285542 is about 65.8501344005.

The spelling of 285542 in words is "two hundred eighty-five thousand, five hundred forty-two".