1155421035 has 24 divisors (see below), whose sum is σ = 2004793440. Its totient is φ = 615589632.

The previous prime is 1155421009. The next prime is 1155421039. The reversal of 1155421035 is 5301245511.

1155421035 is a `hidden beast` number, since 1 + 1 + 554 + 2 + 103 + 5 = 666.

It is not a de Polignac number, because 1155421035 - 2⁷ = 1155420907 is a prime.

It is a super-3 number, since 3×1155421035³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1155421039) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 32682 + ... + 58128.

It is an arithmetic number, because the mean of its divisors is an integer number (83533060).

Almost surely, 2^1155421035 is an apocalyptic number.

1155421035 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155421035 is a deficient number, since it is larger than the sum of its proper divisors (849372405).

1155421035 is a wasteful number, since it uses less digits than its factorization.

1155421035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26467 (or 26464 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1155421035 is about 33991.4847425057. The cubic root of 1155421035 is about 1049.3332229275. Note that the first 3 decimals are identical.

Adding to 1155421035 its reverse (5301245511), we get a palindrome (6456666546).

The spelling of 1155421035 in words is "one billion, one hundred fifty-five million, four hundred twenty-one thousand, thirty-five".