284425 has 12 divisors (see below), whose sum is σ = 365056. Its totient is φ = 219600.

The previous prime is 284423. The next prime is 284429. The reversal of 284425 is 524482.

It is a happy number.

It is not a de Polignac number, because 284425 - 2¹ = 284423 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹² + 8³ + 4⁵ + 4⁵ + 2¹⁸ + 5⁶ .

284425 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 284425.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284423) 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, 592 + ... + 958.

2²⁸⁴⁴²⁵ is an apocalyptic number.

284425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

284425 is a deficient number, since it is larger than the sum of its proper divisors (80631).

284425 is a wasteful number, since it uses less digits than its factorization.

284425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 403 counting only the distinct ones).

The product of its digits is 2560, while the sum is 25.

The square root of 284425 is about 533.3151038551. The cubic root of 284425 is about 65.7641567150.

The spelling of 284425 in words is "two hundred eighty-four thousand, four hundred twenty-five".