1152005123 has 4 divisors (see below), whose sum is σ = 1159634448. Its totient is φ = 1144375800.

The previous prime is 1152005087. The next prime is 1152005161. The reversal of 1152005123 is 3215002511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1152005123 - 2¹⁶ = 1151939587 is a prime.

It is a super-3 number, since 3×1152005123³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1152005095 and 1152005104.

It is not an unprimeable number, because it can be changed into a prime (1152005423) 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 in 3 ways as a sum of consecutive naturals, for example, 3814436 + ... + 3814737.

It is an arithmetic number, because the mean of its divisors is an integer number (289908612).

Almost surely, 2^1152005123 is an apocalyptic number.

1152005123 is a deficient number, since it is larger than the sum of its proper divisors (7629325).

1152005123 is an equidigital number, since it uses as much as digits as its factorization.

1152005123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7629324.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1152005123 is about 33941.2009657879. The cubic root of 1152005123 is about 1048.2981116232.

Adding to 1152005123 its reverse (3215002511), we get a palindrome (4367007634).

The spelling of 1152005123 in words is "one billion, one hundred fifty-two million, five thousand, one hundred twenty-three".