1155134520 has 192 divisors, whose sum is σ = 4063288320. Its totient is φ = 294585984.

The previous prime is 1155134503. The next prime is 1155134527. The reversal of 1155134520 is 254315511.

1155134520 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 134 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155134527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 220977 + ... + 226143.

It is an arithmetic number, because the mean of its divisors is an integer number (21162960).

Almost surely, 2^1155134520 is an apocalyptic number.

1155134520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155134520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2031644160).

1155134520 is an abundant number, since it is smaller than the sum of its proper divisors (2908153800).

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

1155134520 is a wasteful number, since it uses less digits than its factorization.

1155134520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5216 (or 5200 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1155134520 is about 33987.2699697990. The cubic root of 1155134520 is about 1049.2464797825.

The spelling of 1155134520 in words is "one billion, one hundred fifty-five million, one hundred thirty-four thousand, five hundred twenty".