1170711721 has 4 divisors (see below), whose sum is σ = 1182781012. Its totient is φ = 1158642432.

The previous prime is 1170711719. The next prime is 1170711727. The reversal of 1170711721 is 1271170711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 431143696 + 739568025 = 20764^2 + 27195^2 .

It is a cyclic number.

It is not a de Polignac number, because 1170711721 - 2¹ = 1170711719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1170711721.

It is not an unprimeable number, because it can be changed into a prime (1170711727) 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, 6034500 + ... + 6034693.

It is an arithmetic number, because the mean of its divisors is an integer number (295695253).

Almost surely, 2^1170711721 is an apocalyptic number.

It is an amenable number.

1170711721 is a deficient number, since it is larger than the sum of its proper divisors (12069291).

1170711721 is an equidigital number, since it uses as much as digits as its factorization.

1170711721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12069290.

The product of its (nonzero) digits is 686, while the sum is 28.

The square root of 1170711721 is about 34215.6648481364. The cubic root of 1170711721 is about 1053.9418636852.

The spelling of 1170711721 in words is "one billion, one hundred seventy million, seven hundred eleven thousand, seven hundred twenty-one".