1155160272 has 80 divisors (see below), whose sum is σ = 3425594240. Its totient is φ = 328582656.

The previous prime is 1155160267. The next prime is 1155160291. The reversal of 1155160272 is 2720615511.

It is a super-2 number, since 2×1155160272² = 2668790508014227968, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 69438 + ... + 84450.

It is an arithmetic number, because the mean of its divisors is an integer number (42819928).

Almost surely, 2^1155160272 is an apocalyptic number.

1155160272 is a gapful number since it is divisible by the number (12) 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 1155160272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1712797120).

1155160272 is an abundant number, since it is smaller than the sum of its proper divisors (2270433968).

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

1155160272 is a wasteful number, since it uses less digits than its factorization.

1155160272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15260 (or 15254 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 1155160272 is about 33987.6488154153. The cubic root of 1155160272 is about 1049.2542768527.

Adding to 1155160272 its reverse (2720615511), we get a palindrome (3875775783).

The spelling of 1155160272 in words is "one billion, one hundred fifty-five million, one hundred sixty thousand, two hundred seventy-two".