1224531345 has 32 divisors (see below), whose sum is σ = 2010966912. Its totient is φ = 636027392.

The previous prime is 1224531313. The next prime is 1224531349. The reversal of 1224531345 is 5431354221.

It is a cyclic number.

It is not a de Polignac number, because 1224531345 - 2⁵ = 1224531313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1224531349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103294 + ... + 114536.

It is an arithmetic number, because the mean of its divisors is an integer number (62842716).

Almost surely, 2^1224531345 is an apocalyptic number.

1224531345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1224531345 is a deficient number, since it is larger than the sum of its proper divisors (786435567).

1224531345 is a wasteful number, since it uses less digits than its factorization.

1224531345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11441.

The product of its digits is 14400, while the sum is 30.

The square root of 1224531345 is about 34993.3042881063. The cubic root of 1224531345 is about 1069.8510128251.

Adding to 1224531345 its reverse (5431354221), we get a palindrome (6655885566).

The spelling of 1224531345 in words is "one billion, two hundred twenty-four million, five hundred thirty-one thousand, three hundred forty-five".