1155209136 has 20 divisors (see below), whose sum is σ = 2984290392. Its totient is φ = 385069696.

The previous prime is 1155209117. The next prime is 1155209137. The reversal of 1155209136 is 6319025511.

It is a junction number, because it is equal to n+sod(n) for n = 1155209097 and 1155209106.

It is not an unprimeable number, because it can be changed into a prime (1155209137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12033381 + ... + 12033476.

Almost surely, 2^1155209136 is an apocalyptic number.

1155209136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1155209136 is an abundant number, since it is smaller than the sum of its proper divisors (1829081256).

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

1155209136 is a wasteful number, since it uses less digits than its factorization.

1155209136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24066868 (or 24066862 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 1155209136 is about 33988.3676571853. The cubic root of 1155209136 is about 1049.2690713475.

The spelling of 1155209136 in words is "one billion, one hundred fifty-five million, two hundred nine thousand, one hundred thirty-six".