1123235453 has 4 divisors (see below), whose sum is σ = 1161967740. Its totient is φ = 1084503168.

The previous prime is 1123235437. The next prime is 1123235513. The reversal of 1123235453 is 3545323211.

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 733488889 + 389746564 = 27083^2 + 19742^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123235453 - 2⁴ = 1123235437 is a prime.

It is a super-2 number, since 2×1123235453² = 2523315765752230418, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 38732257 = 1123235453 / (1 + 1 + 2 + 3 + 2 + 3 + 5 + 4 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123235423) 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, 19366100 + ... + 19366157.

It is an arithmetic number, because the mean of its divisors is an integer number (290491935).

Almost surely, 2^1123235453 is an apocalyptic number.

It is an amenable number.

1123235453 is a deficient number, since it is larger than the sum of its proper divisors (38732287).

1123235453 is an equidigital number, since it uses as much as digits as its factorization.

1123235453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38732286.

The product of its digits is 10800, while the sum is 29.

The square root of 1123235453 is about 33514.7050263015. The cubic root of 1123235453 is about 1039.4978631797.

Adding to 1123235453 its reverse (3545323211), we get a palindrome (4668558664).

The spelling of 1123235453 in words is "one billion, one hundred twenty-three million, two hundred thirty-five thousand, four hundred fifty-three".