1155105140 has 24 divisors (see below), whose sum is σ = 2772252672. Its totient is φ = 396036000.

The previous prime is 1155105131. The next prime is 1155105169. The reversal of 1155105140 is 415015511.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 4125236 + ... + 4125515.

It is an arithmetic number, because the mean of its divisors is an integer number (115510528).

Almost surely, 2^1155105140 is an apocalyptic number.

1155105140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155105140 is an abundant number, since it is smaller than the sum of its proper divisors (1617147532).

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

1155105140 is a wasteful number, since it uses less digits than its factorization.

1155105140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8250767 (or 8250765 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 23.

The square root of 1155105140 is about 33986.8377463982. The cubic root of 1155105140 is about 1049.2375841020.

The spelling of 1155105140 in words is "one billion, one hundred fifty-five million, one hundred five thousand, one hundred forty".