1155344123 has 8 divisors (see below), whose sum is σ = 1225488528. Its totient is φ = 1085442304.

The previous prime is 1155344107. The next prime is 1155344131. The reversal of 1155344123 is 3214435511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1155344123 - 2⁴ = 1155344107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155344173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50786 + ... + 69927.

It is an arithmetic number, because the mean of its divisors is an integer number (153186066).

Almost surely, 2^1155344123 is an apocalyptic number.

1155344123 is a deficient number, since it is larger than the sum of its proper divisors (70144405).

1155344123 is a wasteful number, since it uses less digits than its factorization.

1155344123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121293.

The product of its digits is 7200, while the sum is 29.

The square root of 1155344123 is about 33990.3533815111. The cubic root of 1155344123 is about 1049.3099390321.

Adding to 1155344123 its reverse (3214435511), we get a palindrome (4369779634).

The spelling of 1155344123 in words is "one billion, one hundred fifty-five million, three hundred forty-four thousand, one hundred twenty-three".