1172166241 has 4 divisors (see below), whose sum is σ = 1172616084. Its totient is φ = 1171716400.

The previous prime is 1172166211. The next prime is 1172166251. The reversal of 1172166241 is 1426612711.

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 772006225 + 400160016 = 27785^2 + 20004^2 .

It is a cyclic number.

It is not a de Polignac number, because 1172166241 - 2⁵ = 1172166209 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1172166211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220990 + ... + 226231.

It is an arithmetic number, because the mean of its divisors is an integer number (293154021).

Almost surely, 2^1172166241 is an apocalyptic number.

It is an amenable number.

1172166241 is a deficient number, since it is larger than the sum of its proper divisors (449843).

1172166241 is an equidigital number, since it uses as much as digits as its factorization.

1172166241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449842.

The product of its digits is 4032, while the sum is 31.

The square root of 1172166241 is about 34236.9134268847. The cubic root of 1172166241 is about 1054.3781638321.

Adding to 1172166241 its reverse (1426612711), we get a palindrome (2598778952).

The spelling of 1172166241 in words is "one billion, one hundred seventy-two million, one hundred sixty-six thousand, two hundred forty-one".