1165500120 has 32 divisors (see below), whose sum is σ = 3496500720. Its totient is φ = 310800000.

The previous prime is 1165500107. The next prime is 1165500121. The reversal of 1165500120 is 210055611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165500121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4856131 + ... + 4856370.

Almost surely, 2^1165500120 is an apocalyptic number.

1165500120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165500120 is an abundant number, since it is smaller than the sum of its proper divisors (2331000600).

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

1165500120 is a wasteful number, since it uses less digits than its factorization.

1165500120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9712515 (or 9712511 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1165500120 is about 34139.4217877222. The cubic root of 1165500120 is about 1052.3756098258.

Adding to 1165500120 its reverse (210055611), we get a palindrome (1375555731).

The spelling of 1165500120 in words is "one billion, one hundred sixty-five million, five hundred thousand, one hundred twenty".