1155420132 has 24 divisors (see below), whose sum is σ = 2696586816. Its totient is φ = 385053408.

The previous prime is 1155420107. The next prime is 1155420143. The reversal of 1155420132 is 2310245511.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67258 + ... + 82670.

It is an arithmetic number, because the mean of its divisors is an integer number (112357784).

Almost surely, 2^1155420132 is an apocalyptic number.

1155420132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1155420132 is an abundant number, since it is smaller than the sum of its proper divisors (1541166684).

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

1155420132 is a wasteful number, since it uses less digits than its factorization.

1155420132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21667 (or 21665 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1155420132 is about 33991.4714597647. The cubic root of 1155420132 is about 1049.3329495645.

Adding to 1155420132 its reverse (2310245511), we get a palindrome (3465665643).

The spelling of 1155420132 in words is "one billion, one hundred fifty-five million, four hundred twenty thousand, one hundred thirty-two".