1284225 has 12 divisors (see below), whose sum is σ = 2123376. Its totient is φ = 684880.

The previous prime is 1284223. The next prime is 1284263. The reversal of 1284225 is 5224821.

It is not a de Polignac number, because 1284225 - 2¹ = 1284223 is a prime.

1284225 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1284195 and 1284204.

It is not an unprimeable number, because it can be changed into a prime (1284223) 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, 8487 + ... + 8636.

It is an arithmetic number, because the mean of its divisors is an integer number (176948).

2^1284225 is an apocalyptic number.

1284225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1284225 is a deficient number, since it is larger than the sum of its proper divisors (839151).

1284225 is a wasteful number, since it uses less digits than its factorization.

1284225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17136 (or 17131 counting only the distinct ones).

The product of its digits is 1280, while the sum is 24.

The square root of 1284225 is about 1133.2365154724. The cubic root of 1284225 is about 108.6960361146.

The spelling of 1284225 in words is "one million, two hundred eighty-four thousand, two hundred twenty-five".