1156021032 has 64 divisors (see below), whose sum is σ = 3019927680. Its totient is φ = 368070912.

The previous prime is 1156020989. The next prime is 1156021033. The reversal of 1156021032 is 2301206511.

1156021032 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1156021033) 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, 681978 + ... + 683670.

It is an arithmetic number, because the mean of its divisors is an integer number (47186370).

Almost surely, 2^1156021032 is an apocalyptic number.

1156021032 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 1156021032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1509963840).

1156021032 is an abundant number, since it is smaller than the sum of its proper divisors (1863906648).

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

1156021032 is a wasteful number, since it uses less digits than its factorization.

1156021032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962 (or 2958 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1156021032 is about 34000.3092927109. The cubic root of 1156021032 is about 1049.5148270981.

Adding to 1156021032 its reverse (2301206511), we get a palindrome (3457227543).

The spelling of 1156021032 in words is "one billion, one hundred fifty-six million, twenty-one thousand, thirty-two".