1158581052 has 72 divisors (see below), whose sum is σ = 2999151792. Its totient is φ = 376992000.

The previous prime is 1158581041. The next prime is 1158581063. The reversal of 1158581052 is 2501858511.

1158581052 is a `hidden beast` number, since 11 + 585 + 8 + 10 + 52 = 666.

It is an interprime number because it is at equal distance from previous prime (1158581041) and next prime (1158581063).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1158580998 and 1158581016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 298927 + ... + 302777.

It is an arithmetic number, because the mean of its divisors is an integer number (41654886).

Almost surely, 2^1158581052 is an apocalyptic number.

1158581052 is a gapful number since it is divisible by the number (12) 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 1158581052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1499575896).

1158581052 is an abundant number, since it is smaller than the sum of its proper divisors (1840570740).

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

1158581052 is a wasteful number, since it uses less digits than its factorization.

1158581052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4059 (or 4054 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 36.

The square root of 1158581052 is about 34037.9354838098. The cubic root of 1158581052 is about 1050.2889762443.

The spelling of 1158581052 in words is "one billion, one hundred fifty-eight million, five hundred eighty-one thousand, fifty-two".