1224641 has 12 divisors (see below), whose sum is σ = 1396500. Its totient is φ = 1071840.

The previous prime is 1224637. The next prime is 1224673. The reversal of 1224641 is 1464221.

It can be written as a sum of positive squares in 2 ways, for example, as 774400 + 450241 = 880^2 + 671^2 .

It is not a de Polignac number, because 1224641 - 2² = 1224637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221641) 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 11 ways as a sum of consecutive naturals, for example, 3335 + ... + 3683.

It is an arithmetic number, because the mean of its divisors is an integer number (116375).

2^1224641 is an apocalyptic number.

1224641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1224641 is a deficient number, since it is larger than the sum of its proper divisors (171859).

1224641 is a wasteful number, since it uses less digits than its factorization.

1224641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 389 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 1224641 is about 1106.6349895065. The cubic root of 1224641 is about 106.9882946406.

Adding to 1224641 its reverse (1464221), we get a palindrome (2688862).

The spelling of 1224641 in words is "one million, two hundred twenty-four thousand, six hundred forty-one".