1224520133 has 4 divisors (see below), whose sum is σ = 1226926380. Its totient is φ = 1222113888.

The previous prime is 1224520097. The next prime is 1224520139. The reversal of 1224520133 is 3310254221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3310254221 = 797 ⋅4153393.

It can be written as a sum of positive squares in 2 ways, for example, as 448507684 + 776012449 = 21178^2 + 27857^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224520133 is a prime.

It is a super-2 number, since 2×1224520133² = 2998899112244675378, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1224520099 and 1224520108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224520139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202360 + ... + 1203377.

It is an arithmetic number, because the mean of its divisors is an integer number (306731595).

Almost surely, 2^1224520133 is an apocalyptic number.

It is an amenable number.

1224520133 is a deficient number, since it is larger than the sum of its proper divisors (2406247).

1224520133 is an equidigital number, since it uses as much as digits as its factorization.

1224520133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406246.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1224520133 is about 34993.1440856634. The cubic root of 1224520133 is about 1069.8477475742.

Adding to 1224520133 its reverse (3310254221), we get a palindrome (4534774354).

The spelling of 1224520133 in words is "one billion, two hundred twenty-four million, five hundred twenty thousand, one hundred thirty-three".