1123040257 has 2 divisors, whose sum is σ = 1123040258. Its totient is φ = 1123040256.

The previous prime is 1123040227. The next prime is 1123040263. The reversal of 1123040257 is 7520403211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1071645696 + 51394561 = 32736^2 + 7169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123040257 is a prime.

It is a super-2 number, since 2×1123040257² = 2522438837685252098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123040227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561520128 + 561520129.

It is an arithmetic number, because the mean of its divisors is an integer number (561520129).

Almost surely, 2^1123040257 is an apocalyptic number.

It is an amenable number.

1123040257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123040257 is an equidigital number, since it uses as much as digits as its factorization.

1123040257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1123040257 is about 33511.7928049217. The cubic root of 1123040257 is about 1039.4376450010.

Adding to 1123040257 its reverse (7520403211), we get a palindrome (8643443468).

The spelling of 1123040257 in words is "one billion, one hundred twenty-three million, forty thousand, two hundred fifty-seven".