1284825 has 24 divisors (see below), whose sum is σ = 2186368. Its totient is φ = 665280.

The previous prime is 1284823. The next prime is 1284841. The reversal of 1284825 is 5284821.

It is not a de Polignac number, because 1284825 - 2¹ = 1284823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1284792 and 1284801.

It is not an unprimeable number, because it can be changed into a prime (1284823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2544 + ... + 3006.

2^1284825 is an apocalyptic number.

1284825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1284825 is a deficient number, since it is larger than the sum of its proper divisors (901543).

1284825 is a wasteful number, since it uses less digits than its factorization.

1284825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 508 counting only the distinct ones).

The product of its digits is 5120, while the sum is 30.

The square root of 1284825 is about 1133.5012130563. The cubic root of 1284825 is about 108.7129613594.

The spelling of 1284825 in words is "one million, two hundred eighty-four thousand, eight hundred twenty-five".