1165200100 has 72 divisors (see below), whose sum is σ = 2619276800. Its totient is φ = 449452800.

The previous prime is 1165200059. The next prime is 1165200109. The reversal of 1165200100 is 10025611.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1165200109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1267441 + ... + 1268359.

Almost surely, 2^1165200100 is an apocalyptic number.

1165200100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1165200100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1309638400).

1165200100 is an abundant number, since it is smaller than the sum of its proper divisors (1454076700).

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

1165200100 is a wasteful number, since it uses less digits than its factorization.

1165200100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1366 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1165200100 is about 34135.0274644682. The cubic root of 1165200100 is about 1052.2853021485.

Adding to 1165200100 its reverse (10025611), we get a palindrome (1175225711).

The spelling of 1165200100 in words is "one billion, one hundred sixty-five million, two hundred thousand, one hundred".