1123346561 has 2 divisors, whose sum is σ = 1123346562. Its totient is φ = 1123346560.

The previous prime is 1123346513. The next prime is 1123346573. The reversal of 1123346561 is 1656433211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 916878400 + 206468161 = 30280^2 + 14369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123346561 is a prime.

It is a super-2 number, since 2×1123346561² = 2523814992221053442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123346591) 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, 561673280 + 561673281.

It is an arithmetic number, because the mean of its divisors is an integer number (561673281).

Almost surely, 2^1123346561 is an apocalyptic number.

It is an amenable number.

1123346561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123346561 is an equidigital number, since it uses as much as digits as its factorization.

1123346561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 1123346561 is about 33516.3625860564. The cubic root of 1123346561 is about 1039.5321370031.

Adding to 1123346561 its reverse (1656433211), we get a palindrome (2779779772).

The spelling of 1123346561 in words is "one billion, one hundred twenty-three million, three hundred forty-six thousand, five hundred sixty-one".