1224155 has 8 divisors (see below), whose sum is σ = 1483872. Its totient is φ = 969408.

The previous prime is 1224149. The next prime is 1224163. The reversal of 1224155 is 5514221.

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

It is a cyclic number.

It is not a de Polignac number, because 1224155 - 2¹⁸ = 962011 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 674 + ... + 1703.

It is an arithmetic number, because the mean of its divisors is an integer number (185484).

2^1224155 is an apocalyptic number.

1224155 is a deficient number, since it is larger than the sum of its proper divisors (259717).

1224155 is a wasteful number, since it uses less digits than its factorization.

1224155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485.

The product of its digits is 400, while the sum is 20.

The square root of 1224155 is about 1106.4153831179. The cubic root of 1224155 is about 106.9741399642.

Adding to 1224155 its reverse (5514221), we get a palindrome (6738376).

The spelling of 1224155 in words is "one million, two hundred twenty-four thousand, one hundred fifty-five".