1155572000 has 96 divisors (see below), whose sum is σ = 3097471104. Its totient is φ = 420192000.

The previous prime is 1155571997. The next prime is 1155572009. The reversal of 1155572000 is 2755511.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1155572009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30869 + ... + 57131.

It is an arithmetic number, because the mean of its divisors is an integer number (32265324).

Almost surely, 2^1155572000 is an apocalyptic number.

1155572000 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 1155572000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1548735552).

1155572000 is an abundant number, since it is smaller than the sum of its proper divisors (1941899104).

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

1155572000 is a wasteful number, since it uses less digits than its factorization.

1155572000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26299 (or 26281 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 1155572000 is about 33993.7052996581. The cubic root of 1155572000 is about 1049.3789221968.

The spelling of 1155572000 in words is "one billion, one hundred fifty-five million, five hundred seventy-two thousand".