1123450345 has 4 divisors (see below), whose sum is σ = 1348140420. Its totient is φ = 898760272.

The previous prime is 1123450337. The next prime is 1123450357. The reversal of 1123450345 is 5430543211.

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 219365721 + 904084624 = 14811^2 + 30068^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123450345 - 2³ = 1123450337 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112345030 + ... + 112345039.

It is an arithmetic number, because the mean of its divisors is an integer number (337035105).

Almost surely, 2^1123450345 is an apocalyptic number.

It is an amenable number.

1123450345 is a deficient number, since it is larger than the sum of its proper divisors (224690075).

1123450345 is an equidigital number, since it uses as much as digits as its factorization.

1123450345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224690074.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1123450345 is about 33517.9108089988. The cubic root of 1123450345 is about 1039.5641495285.

Adding to 1123450345 its reverse (5430543211), we get a palindrome (6553993556).

The spelling of 1123450345 in words is "one billion, one hundred twenty-three million, four hundred fifty thousand, three hundred forty-five".