1155451040 has 24 divisors (see below), whose sum is σ = 2729753460. Its totient is φ = 462180352.

The previous prime is 1155451021. The next prime is 1155451043. The reversal of 1155451040 is 401545511.

It can be written as a sum of positive squares in 2 ways, for example, as 1050019216 + 105431824 = 32404^2 + 10268^2 .

It is not an unprimeable number, because it can be changed into a prime (1155451043) 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 3 ways as a sum of consecutive naturals, for example, 3610625 + ... + 3610944.

Almost surely, 2^1155451040 is an apocalyptic number.

1155451040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155451040 is an abundant number, since it is smaller than the sum of its proper divisors (1574302420).

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

1155451040 is an equidigital number, since it uses as much as digits as its factorization.

1155451040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7221584 (or 7221576 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1155451040 is about 33991.9261001786. The cubic root of 1155451040 is about 1049.3423061880.

Adding to 1155451040 its reverse (401545511), we get a palindrome (1556996551).

The spelling of 1155451040 in words is "one billion, one hundred fifty-five million, four hundred fifty-one thousand, forty".