285240959 has 4 divisors (see below), whose sum is σ = 286351104. Its totient is φ = 284130816.

The previous prime is 285240947. The next prime is 285240997. The reversal of 285240959 is 959042582.

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

It is a cyclic number.

It is not a de Polignac number, because 285240959 - 2²⁴ = 268463743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285240919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554687 + ... + 555200.

It is an arithmetic number, because the mean of its divisors is an integer number (71587776).

Almost surely, 2^285240959 is an apocalyptic number.

285240959 is a deficient number, since it is larger than the sum of its proper divisors (1110145).

285240959 is a wasteful number, since it uses less digits than its factorization.

285240959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110144.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 285240959 is about 16889.0780979898. The cubic root of 285240959 is about 658.2698478687.

The spelling of 285240959 in words is "two hundred eighty-five million, two hundred forty thousand, nine hundred fifty-nine".