1155123104 has 48 divisors (see below), whose sum is σ = 2342295648. Its totient is φ = 560431872.

The previous prime is 1155123103. The next prime is 1155123133. The reversal of 1155123104 is 4013215511.

It is a self number, because there is not a number n which added to its sum of digits gives 1155123104.

It is not an unprimeable number, because it can be changed into a prime (1155123103) 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, 213359 + ... + 218705.

It is an arithmetic number, because the mean of its divisors is an integer number (48797826).

Almost surely, 2^1155123104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155123104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1171147824).

1155123104 is an abundant number, since it is smaller than the sum of its proper divisors (1187172544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155123104 is a wasteful number, since it uses less digits than its factorization.

1155123104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5557 (or 5549 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1155123104 is about 33987.1020241503. The cubic root of 1155123104 is about 1049.2430232624.

Adding to 1155123104 its reverse (4013215511), we get a palindrome (5168338615).

The spelling of 1155123104 in words is "one billion, one hundred fifty-five million, one hundred twenty-three thousand, one hundred four".