1224864 has 36 divisors (see below), whose sum is σ = 3484026. Its totient is φ = 408192.

The previous prime is 1224863. The next prime is 1224869. The reversal of 1224864 is 4684221.

It can be written as a sum of positive squares in only one way, i.e., 1192464 + 32400 = 1092^2 + 180^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1224863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1839 + ... + 2414.

2^1224864 is an apocalyptic number.

It is an amenable number.

1224864 is an abundant number, since it is smaller than the sum of its proper divisors (2259162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1224864 is a wasteful number, since it uses less digits than its factorization.

1224864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4269 (or 4258 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 1224864 is about 1106.7357408162. The cubic root of 1224864 is about 106.9947882284.

The spelling of 1224864 in words is "one million, two hundred twenty-four thousand, eight hundred sixty-four".