1172009 has 2 divisors, whose sum is σ = 1172010. Its totient is φ = 1172008.

The previous prime is 1171999. The next prime is 1172021. The reversal of 1172009 is 9002711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1155625 + 16384 = 1075^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1172009 - 2¹² = 1167913 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p₉₀₉₁₁ and since 1172009 and 90911 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1172029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586004 + 586005.

It is an arithmetic number, because the mean of its divisors is an integer number (586005).

2^1172009 is an apocalyptic number.

It is an amenable number.

1172009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172009 is an equidigital number, since it uses as much as digits as its factorization.

1172009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 1172009 is about 1082.5936449102. The cubic root of 1172009 is about 105.4331014976.

The spelling of 1172009 in words is "one million, one hundred seventy-two thousand, nine".