1155450120 has 64 divisors (see below), whose sum is σ = 3781477440. Its totient is φ = 280108800.

The previous prime is 1155450089. The next prime is 1155450133. The reversal of 1155450120 is 210545511.

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

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 436351 + ... + 438990.

It is an arithmetic number, because the mean of its divisors is an integer number (59085585).

Almost surely, 2^1155450120 is an apocalyptic number.

1155450120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155450120 is an abundant number, since it is smaller than the sum of its proper divisors (2626027320).

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

1155450120 is a wasteful number, since it uses less digits than its factorization.

1155450120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875366 (or 875362 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 1155450120 is about 33991.9125675505. The cubic root of 1155450120 is about 1049.3420276835.

Adding to 1155450120 its reverse (210545511), we get a palindrome (1365995631).

The spelling of 1155450120 in words is "one billion, one hundred fifty-five million, four hundred fifty thousand, one hundred twenty".