1286224 has 20 divisors (see below), whose sum is σ = 2623840. Its totient is φ = 609120.

The previous prime is 1286209. The next prime is 1286227. The reversal of 1286224 is 4226821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286227) 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 3 ways as a sum of consecutive naturals, for example, 1812 + ... + 2419.

It is an arithmetic number, because the mean of its divisors is an integer number (131192).

2^1286224 is an apocalyptic number.

It is an amenable number.

1286224 is an abundant number, since it is smaller than the sum of its proper divisors (1337616).

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

1286224 is a wasteful number, since it uses less digits than its factorization.

1286224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4258 (or 4252 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 1286224 is about 1134.1181596289. The cubic root of 1286224 is about 108.7524049321.

It can be divided in two parts, 1 and 286224, that added together give a square (286225 = 535²).

The spelling of 1286224 in words is "one million, two hundred eighty-six thousand, two hundred twenty-four".