1155904312 has 8 divisors (see below), whose sum is σ = 2167320600. Its totient is φ = 577952152.

The previous prime is 1155904259. The next prime is 1155904319. The reversal of 1155904312 is 2134095511.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1155904312² = 2672229557000386688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155904319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72244012 + ... + 72244027.

It is an arithmetic number, because the mean of its divisors is an integer number (270915075).

Almost surely, 2^1155904312 is an apocalyptic number.

It is an amenable number.

1155904312 is a deficient number, since it is larger than the sum of its proper divisors (1011416288).

1155904312 is a wasteful number, since it uses less digits than its factorization.

1155904312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144488045 (or 144488041 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1155904312 is about 33998.5927944084. The cubic root of 1155904312 is about 1049.4795037807.

Adding to 1155904312 its reverse (2134095511), we get a palindrome (3289999823).

The spelling of 1155904312 in words is "one billion, one hundred fifty-five million, nine hundred four thousand, three hundred twelve".