1224105 has 16 divisors (see below), whose sum is σ = 1985280. Its totient is φ = 643968.

The previous prime is 1224089. The next prime is 1224109. The reversal of 1224105 is 5014221.

It is not a de Polignac number, because 1224105 - 2⁴ = 1224089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1224109) 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 15 ways as a sum of consecutive naturals, for example, 669 + ... + 1701.

It is an arithmetic number, because the mean of its divisors is an integer number (124080).

2^1224105 is an apocalyptic number.

1224105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1224105 is a deficient number, since it is larger than the sum of its proper divisors (761175).

1224105 is a wasteful number, since it uses less digits than its factorization.

1224105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1224105 is about 1106.3927873951. The cubic root of 1224105 is about 106.9726835093.

Adding to 1224105 its reverse (5014221), we get a palindrome (6238326).

The spelling of 1224105 in words is "one million, two hundred twenty-four thousand, one hundred five".