1155621732 has 24 divisors (see below), whose sum is σ = 2759160096. Its totient is φ = 376248768.

The previous prime is 1155621679. The next prime is 1155621739. The reversal of 1155621732 is 2371265511.

It is a junction number, because it is equal to n+sod(n) for n = 1155621693 and 1155621702.

It is not an unprimeable number, because it can be changed into a prime (1155621739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1119273 + ... + 1120304.

It is an arithmetic number, because the mean of its divisors is an integer number (114965004).

Almost surely, 2^1155621732 is an apocalyptic number.

1155621732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1155621732 is an abundant number, since it is smaller than the sum of its proper divisors (1603538364).

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

1155621732 is a wasteful number, since it uses less digits than its factorization.

1155621732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239627 (or 2239625 counting only the distinct ones).

The product of its digits is 12600, while the sum is 33.

The square root of 1155621732 is about 33994.4367801557. The cubic root of 1155621732 is about 1049.3939759145.

The spelling of 1155621732 in words is "one billion, one hundred fifty-five million, six hundred twenty-one thousand, seven hundred thirty-two".