1172309121 has 27 divisors (see below), whose sum is σ = 1725536137. Its totient is φ = 766953600.

The previous prime is 1172309119. The next prime is 1172309141. The reversal of 1172309121 is 1219032711.

The square root of 1172309121 is 34239.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5130225 + 1167178896 = 2265^2 + 34164^2 .

It is not a de Polignac number, because 1172309121 - 2¹ = 1172309119 is a prime.

It is a super-3 number, since 3×1172309121³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1172309141) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10374361 + ... + 10374473.

Almost surely, 2^1172309121 is an apocalyptic number.

1172309121 is the 34239-th square number.

1172309121 is the 17120-th centered octagonal number.

It is an amenable number.

1172309121 is a deficient number, since it is larger than the sum of its proper divisors (553227016).

1172309121 is an equidigital number, since it uses as much as digits as its factorization.

1172309121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The cubic root of 1172309121 is about 1054.4210028726.

The spelling of 1172309121 in words is "one billion, one hundred seventy-two million, three hundred nine thousand, one hundred twenty-one".