1152312156 has 120 divisors (see below), whose sum is σ = 3215930256. Its totient is φ = 358525440.

The previous prime is 1152312107. The next prime is 1152312169. The reversal of 1152312156 is 6512132511.

1152312156 is a `hidden beast` number, since 11 + 523 + 121 + 5 + 6 = 666.

1152312156 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 720750 + ... + 722346.

Almost surely, 2^1152312156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1152312156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1607965128).

1152312156 is an abundant number, since it is smaller than the sum of its proper divisors (2063618100).

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

1152312156 is a wasteful number, since it uses less digits than its factorization.

1152312156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761 (or 1750 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1152312156 is about 33945.7236776593. The cubic root of 1152312156 is about 1048.3912343352.

Adding to 1152312156 its reverse (6512132511), we get a palindrome (7664444667).

The spelling of 1152312156 in words is "one billion, one hundred fifty-two million, three hundred twelve thousand, one hundred fifty-six".