1167721041 has 32 divisors (see below), whose sum is σ = 1710374400. Its totient is φ = 705669120.

The previous prime is 1167721021. The next prime is 1167721099. The reversal of 1167721041 is 1401277611.

It is not a de Polignac number, because 1167721041 - 2¹⁵ = 1167688273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1167721021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161655 + ... + 168723.

It is an arithmetic number, because the mean of its divisors is an integer number (53449200).

Almost surely, 2^1167721041 is an apocalyptic number.

It is an amenable number.

1167721041 is a deficient number, since it is larger than the sum of its proper divisors (542653359).

1167721041 is a wasteful number, since it uses less digits than its factorization.

1167721041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7209.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 1167721041 is about 34171.9335273847. The cubic root of 1167721041 is about 1053.0436378085.

Adding to 1167721041 its reverse (1401277611), we get a palindrome (2568998652).

The spelling of 1167721041 in words is "one billion, one hundred sixty-seven million, seven hundred twenty-one thousand, forty-one".