1167721125 has 16 divisors (see below), whose sum is σ = 1943088576. Its totient is φ = 622784400.

The previous prime is 1167721103. The next prime is 1167721129. The reversal of 1167721125 is 5211277611.

It is not a de Polignac number, because 1167721125 - 2⁷ = 1167720997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1167721129) 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, 1556587 + ... + 1557336.

It is an arithmetic number, because the mean of its divisors is an integer number (121443036).

Almost surely, 2^1167721125 is an apocalyptic number.

1167721125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1167721125 is a deficient number, since it is larger than the sum of its proper divisors (775367451).

1167721125 is an equidigital number, since it uses as much as digits as its factorization.

1167721125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3113941 (or 3113931 counting only the distinct ones).

The product of its digits is 5880, while the sum is 33.

The square root of 1167721125 is about 34171.9347564635. The cubic root of 1167721125 is about 1053.0436630587.

Adding to 1167721125 its reverse (5211277611), we get a palindrome (6378998736).

The spelling of 1167721125 in words is "one billion, one hundred sixty-seven million, seven hundred twenty-one thousand, one hundred twenty-five".