1150123543 has 4 divisors (see below), whose sum is σ = 1150192008. Its totient is φ = 1150055080.

The previous prime is 1150123531. The next prime is 1150123553. The reversal of 1150123543 is 3453210511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3453210511 = 21751 ⋅158761.

It is a cyclic number.

It is not a de Polignac number, because 1150123543 - 2⁹ = 1150123031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1150123553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10128 + ... + 49018.

It is an arithmetic number, because the mean of its divisors is an integer number (287548002).

Almost surely, 2^1150123543 is an apocalyptic number.

1150123543 is a deficient number, since it is larger than the sum of its proper divisors (68465).

1150123543 is an equidigital number, since it uses as much as digits as its factorization.

1150123543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68464.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1150123543 is about 33913.4714088664. The cubic root of 1150123543 is about 1047.7270691356.

The spelling of 1150123543 in words is "one billion, one hundred fifty million, one hundred twenty-three thousand, five hundred forty-three".