1224401 has 4 divisors (see below), whose sum is σ = 1235952. Its totient is φ = 1212852.

The previous prime is 1224389. The next prime is 1224403. The reversal of 1224401 is 1044221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1044221 = 19 ⋅54959.

It is a cyclic number.

It is not a de Polignac number, because 1224401 - 2⁶ = 1224337 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224403) 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 3 ways as a sum of consecutive naturals, for example, 5615 + ... + 5828.

It is an arithmetic number, because the mean of its divisors is an integer number (308988).

2^1224401 is an apocalyptic number.

It is an amenable number.

1224401 is a deficient number, since it is larger than the sum of its proper divisors (11551).

1224401 is a wasteful number, since it uses less digits than its factorization.

1224401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11550.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1224401 is about 1106.5265473544. The cubic root of 1224401 is about 106.9813051451.

Adding to 1224401 its reverse (1044221), we get a palindrome (2268622).

The spelling of 1224401 in words is "one million, two hundred twenty-four thousand, four hundred one".