1155421104 has 20 divisors (see below), whose sum is σ = 2984837976. Its totient is φ = 385140352.

The previous prime is 1155421093. The next prime is 1155421153. The reversal of 1155421104 is 4011245511.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12035589 + ... + 12035684.

Almost surely, 2^1155421104 is an apocalyptic number.

It is an amenable number.

1155421104 is an abundant number, since it is smaller than the sum of its proper divisors (1829416872).

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

1155421104 is a wasteful number, since it uses less digits than its factorization.

1155421104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24071284 (or 24071278 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1155421104 is about 33991.4857574658. The cubic root of 1155421104 is about 1049.3332438157. Note that the first 3 decimals are identical.

Adding to 1155421104 its reverse (4011245511), we get a palindrome (5166666615).

The spelling of 1155421104 in words is "one billion, one hundred fifty-five million, four hundred twenty-one thousand, one hundred four".