1381224 has 64 divisors (see below), whose sum is σ = 3931200. Its totient is φ = 400896.

The previous prime is 1381217. The next prime is 1381229. The reversal of 1381224 is 4221831.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1381224.

It is not an unprimeable number, because it can be changed into a prime (1381229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5812 + ... + 6044.

It is an arithmetic number, because the mean of its divisors is an integer number (61425).

2^1381224 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 1381224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1965600).

1381224 is an abundant number, since it is smaller than the sum of its proper divisors (2549976).

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

1381224 is a wasteful number, since it uses less digits than its factorization.

1381224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 270 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 1381224 is about 1175.2548659759. The cubic root of 1381224 is about 111.3665344544.

The spelling of 1381224 in words is "one million, three hundred eighty-one thousand, two hundred twenty-four".