1165421152 has 24 divisors (see below), whose sum is σ = 2622198096. Its totient is φ = 499466112.

The previous prime is 1165421141. The next prime is 1165421189. The reversal of 1165421152 is 2511245611.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1165421152.

It is a congruent number.

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, 2601163 + ... + 2601610.

It is an arithmetic number, because the mean of its divisors is an integer number (109258254).

Almost surely, 2^1165421152 is an apocalyptic number.

It is an amenable number.

1165421152 is an abundant number, since it is smaller than the sum of its proper divisors (1456776944).

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

1165421152 is an equidigital number, since it uses as much as digits as its factorization.

1165421152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5202790 (or 5202782 counting only the distinct ones).

The product of its digits is 2400, while the sum is 28.

The square root of 1165421152 is about 34138.2652166158. The cubic root of 1165421152 is about 1052.3518415245.

Adding to 1165421152 its reverse (2511245611), we get a palindrome (3676666763).

The spelling of 1165421152 in words is "one billion, one hundred sixty-five million, four hundred twenty-one thousand, one hundred fifty-two".