1281224 has 32 divisors (see below), whose sum is σ = 2782080. Its totient is φ = 541824.

The previous prime is 1281221. The next prime is 1281229. The reversal of 1281224 is 4221821.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1281196 and 1281205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7589 + ... + 7755.

It is an arithmetic number, because the mean of its divisors is an integer number (86940).

2^1281224 is an apocalyptic number.

1281224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1281224 is an abundant number, since it is smaller than the sum of its proper divisors (1500856).

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

1281224 is a wasteful number, since it uses less digits than its factorization.

1281224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317 (or 313 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

The square root of 1281224 is about 1131.9116573302. The cubic root of 1281224 is about 108.6113024627.

The spelling of 1281224 in words is "one million, two hundred eighty-one thousand, two hundred twenty-four".