1284489 has 18 divisors (see below), whose sum is σ = 1933386. Its totient is φ = 821280.

The previous prime is 1284487. The next prime is 1284511. The reversal of 1284489 is 9844821.

It can be written as a sum of positive squares in only one way, i.e., 783225 + 501264 = 885^2 + 708^2 .

It is not a de Polignac number, because 1284489 - 2¹ = 1284487 is a prime.

It is a super-2 number, since 2×1284489² = 3299823982242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284487) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21742 + ... + 21800.

2^1284489 is an apocalyptic number.

It is an amenable number.

1284489 is a deficient number, since it is larger than the sum of its proper divisors (648897).

1284489 is an equidigital number, since it uses as much as digits as its factorization.

1284489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 103 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 1284489 is about 1133.3529900256. The cubic root of 1284489 is about 108.7034838716.

The spelling of 1284489 in words is "one million, two hundred eighty-four thousand, four hundred eighty-nine".