1123541457 has 4 divisors (see below), whose sum is σ = 1498055280. Its totient is φ = 749027636.

The previous prime is 1123541437. The next prime is 1123541477. The reversal of 1123541457 is 7541453211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1123541437) and next prime (1123541477).

It is a cyclic number.

It is not a de Polignac number, because 1123541457 - 2¹⁵ = 1123508689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1123541437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187256907 + ... + 187256912.

It is an arithmetic number, because the mean of its divisors is an integer number (374513820).

Almost surely, 2^1123541457 is an apocalyptic number.

It is an amenable number.

1123541457 is a deficient number, since it is larger than the sum of its proper divisors (374513823).

1123541457 is an equidigital number, since it uses as much as digits as its factorization.

1123541457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374513822.

The product of its digits is 16800, while the sum is 33.

The square root of 1123541457 is about 33519.2699353670. The cubic root of 1123541457 is about 1039.5922517076.

Adding to 1123541457 its reverse (7541453211), we get a palindrome (8664994668).

The spelling of 1123541457 in words is "one billion, one hundred twenty-three million, five hundred forty-one thousand, four hundred fifty-seven".