1147581120 has 224 divisors, whose sum is σ = 4184294400. Its totient is φ = 261033984.

The previous prime is 1147581109. The next prime is 1147581143. The reversal of 1147581120 is 211857411.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2613861 + ... + 2614299.

Almost surely, 2^1147581120 is an apocalyptic number.

1147581120 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 1147581120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2092147200).

1147581120 is an abundant number, since it is smaller than the sum of its proper divisors (3036713280).

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

1147581120 is a wasteful number, since it uses less digits than its factorization.

1147581120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 30.

The square root of 1147581120 is about 33875.9667020736. The cubic root of 1147581120 is about 1046.9544765918.

The spelling of 1147581120 in words is "one billion, one hundred forty-seven million, five hundred eighty-one thousand, one hundred twenty".