1224312065 has 4 divisors (see below), whose sum is σ = 1469174484. Its totient is φ = 979449648.

The previous prime is 1224312043. The next prime is 1224312073. The reversal of 1224312065 is 5602134221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 191075329 + 1033236736 = 13823^2 + 32144^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224312065 - 2¹⁸ = 1224049921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122431202 + ... + 122431211.

It is an arithmetic number, because the mean of its divisors is an integer number (367293621).

Almost surely, 2^1224312065 is an apocalyptic number.

It is an amenable number.

1224312065 is a deficient number, since it is larger than the sum of its proper divisors (244862419).

1224312065 is an equidigital number, since it uses as much as digits as its factorization.

1224312065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244862418.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1224312065 is about 34990.1709770044. The cubic root of 1224312065 is about 1069.7871486821.

Adding to 1224312065 its reverse (5602134221), we get a palindrome (6826446286).

The spelling of 1224312065 in words is "one billion, two hundred twenty-four million, three hundred twelve thousand, sixty-five".