284725 has 12 divisors (see below), whose sum is σ = 403744. Its totient is φ = 195120.

The previous prime is 284723. The next prime is 284729. The reversal of 284725 is 527482.

It is not a de Polignac number, because 284725 - 2¹ = 284723 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 284693 and 284702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 639 + ... + 988.

2²⁸⁴⁷²⁵ is an apocalyptic number.

284725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

284725 is a deficient number, since it is larger than the sum of its proper divisors (119019).

284725 is a wasteful number, since it uses less digits than its factorization.

284725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1639 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 284725 is about 533.5962893424. The cubic root of 284725 is about 65.7872703824.

It can be divided in two parts, 28 and 4725, that added together give a triangular number (4753 = T₉₇).

The spelling of 284725 in words is "two hundred eighty-four thousand, seven hundred twenty-five".