1155305481 has 8 divisors (see below), whose sum is σ = 1680444384. Its totient is φ = 700185120.

The previous prime is 1155305477. The next prime is 1155305483. The reversal of 1155305481 is 1845035511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1155305481 - 2² = 1155305477 is a prime.

It is a super-2 number, since 2×1155305481² = 2669461508857282722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 35009257 = 1155305481 / (1 + 1 + 5 + 5 + 3 + 0 + 5 + 4 + 8 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1155305483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17504596 + ... + 17504661.

It is an arithmetic number, because the mean of its divisors is an integer number (210055548).

Almost surely, 2^1155305481 is an apocalyptic number.

1155305481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1155305481 is a deficient number, since it is larger than the sum of its proper divisors (525138903).

1155305481 is a wasteful number, since it uses less digits than its factorization.

1155305481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35009271.

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 1155305481 is about 33989.7849507760. The cubic root of 1155305481 is about 1049.2982403858.

The spelling of 1155305481 in words is "one billion, one hundred fifty-five million, three hundred five thousand, four hundred eighty-one".