1123420453 has 2 divisors, whose sum is σ = 1123420454. Its totient is φ = 1123420452.

The previous prime is 1123420447. The next prime is 1123420457. The reversal of 1123420453 is 3540243211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1108690209 + 14730244 = 33297^2 + 3838^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123420453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123420457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561710226 + 561710227.

It is an arithmetic number, because the mean of its divisors is an integer number (561710227).

Almost surely, 2^1123420453 is an apocalyptic number.

It is an amenable number.

1123420453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123420453 is an equidigital number, since it uses as much as digits as its factorization.

1123420453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1123420453 is about 33517.4648951856. The cubic root of 1123420453 is about 1039.5549294423.

Adding to 1123420453 its reverse (3540243211), we get a palindrome (4663663664).

The spelling of 1123420453 in words is "one billion, one hundred twenty-three million, four hundred twenty thousand, four hundred fifty-three".