1224681 has 8 divisors (see below), whose sum is σ = 1704000. Its totient is φ = 780912.

The previous prime is 1224677. The next prime is 1224701. The reversal of 1224681 is 1864221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1224681 - 2² = 1224677 is a prime.

It is a super-2 number, since 2×1224681² = 2999687103522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1224281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8806 + ... + 8943.

It is an arithmetic number, because the mean of its divisors is an integer number (213000).

2^1224681 is an apocalyptic number.

It is an amenable number.

1224681 is a deficient number, since it is larger than the sum of its proper divisors (479319).

1224681 is a wasteful number, since it uses less digits than its factorization.

1224681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17775.

The product of its digits is 768, while the sum is 24.

The square root of 1224681 is about 1106.6530621654. The cubic root of 1224681 is about 106.9894594677.

Adding to 1224681 its product of digits (768), we get a square (1225449 = 1107²).

The spelling of 1224681 in words is "one million, two hundred twenty-four thousand, six hundred eighty-one".