1224523453 has 4 divisors (see below), whose sum is σ = 1226434428. Its totient is φ = 1222612480.

The previous prime is 1224523451. The next prime is 1224523543. The reversal of 1224523453 is 3543254221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3543254221 = 13 ⋅272558017.

It can be written as a sum of positive squares in 2 ways, for example, as 1157496484 + 67026969 = 34022^2 + 8187^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224523453 - 2¹ = 1224523451 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224523451) 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, 954526 + ... + 955807.

It is an arithmetic number, because the mean of its divisors is an integer number (306608607).

Almost surely, 2^1224523453 is an apocalyptic number.

It is an amenable number.

1224523453 is a deficient number, since it is larger than the sum of its proper divisors (1910975).

1224523453 is an equidigital number, since it uses as much as digits as its factorization.

1224523453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910974.

The product of its digits is 28800, while the sum is 31.

The square root of 1224523453 is about 34993.1915234950. The cubic root of 1224523453 is about 1069.8487144540.

Adding to 1224523453 its reverse (3543254221), we get a palindrome (4767777674).

The spelling of 1224523453 in words is "one billion, two hundred twenty-four million, five hundred twenty-three thousand, four hundred fifty-three".