1173134721 has 16 divisors (see below), whose sum is σ = 1725554880. Its totient is φ = 703000320.

The previous prime is 1173134717. The next prime is 1173134741. The reversal of 1173134721 is 1274313711.

It is not a de Polignac number, because 1173134721 - 2² = 1173134717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1173134741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196780 + ... + 202653.

It is an arithmetic number, because the mean of its divisors is an integer number (107847180).

Almost surely, 2^1173134721 is an apocalyptic number.

1173134721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1173134721 is a deficient number, since it is larger than the sum of its proper divisors (552420159).

1173134721 is a wasteful number, since it uses less digits than its factorization.

1173134721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399536.

The product of its digits is 3528, while the sum is 30.

The square root of 1173134721 is about 34251.0543049407. The cubic root of 1173134721 is about 1054.6684705092.

The spelling of 1173134721 in words is "one billion, one hundred seventy-three million, one hundred thirty-four thousand, seven hundred twenty-one".