1284644 has 12 divisors (see below), whose sum is σ = 2257164. Its totient is φ = 639744.

The previous prime is 1284641. The next prime is 1284659. The reversal of 1284644 is 4464821.

It can be written as a sum of positive squares in 2 ways, for example, as 438244 + 846400 = 662^2 + 920^2 .

It is not an unprimeable number, because it can be changed into a prime (1284641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872 + ... + 1824.

It is an arithmetic number, because the mean of its divisors is an integer number (188097).

2^1284644 is an apocalyptic number.

It is an amenable number.

1284644 is a deficient number, since it is larger than the sum of its proper divisors (972520).

1284644 is a wasteful number, since it uses less digits than its factorization.

1284644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294 (or 1292 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

The square root of 1284644 is about 1133.4213691298. The cubic root of 1284644 is about 108.7078561323.

The spelling of 1284644 in words is "one million, two hundred eighty-four thousand, six hundred forty-four".