1244864 has 28 divisors (see below), whose sum is σ = 2523744. Its totient is φ = 609024.

The previous prime is 1244863. The next prime is 1244879. The reversal of 1244864 is 4684421.

It is not an unprimeable number, because it can be changed into a prime (1244863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3209 + ... + 3575.

2^1244864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1244864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1261872).

1244864 is an abundant number, since it is smaller than the sum of its proper divisors (1278880).

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

1244864 is an equidigital number, since it uses as much as digits as its factorization.

1244864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 422 counting only the distinct ones).

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

The square root of 1244864 is about 1115.7347354994. The cubic root of 1244864 is about 107.5739962866.

The spelling of 1244864 in words is "one million, two hundred forty-four thousand, eight hundred sixty-four".