1224401345 has 8 divisors (see below), whose sum is σ = 1469641320. Its totient is φ = 979281280.

The previous prime is 1224401341. The next prime is 1224401351. The reversal of 1224401345 is 5431044221.

It can be written as a sum of positive squares in 4 ways, for example, as 51955264 + 1172446081 = 7208^2 + 34241^2 .

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

It is not a de Polignac number, because 1224401345 - 2² = 1224401341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1224401341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5726 + ... + 49815.

It is an arithmetic number, because the mean of its divisors is an integer number (183705165).

Almost surely, 2^1224401345 is an apocalyptic number.

It is an amenable number.

1224401345 is a deficient number, since it is larger than the sum of its proper divisors (245239975).

1224401345 is an equidigital number, since it uses as much as digits as its factorization.

1224401345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59955.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1224401345 is about 34991.4467405965. The cubic root of 1224401345 is about 1069.8131519313.

Adding to 1224401345 its reverse (5431044221), we get a palindrome (6655445566).

The spelling of 1224401345 in words is "one billion, two hundred twenty-four million, four hundred one thousand, three hundred forty-five".