1320173 has 2 divisors, whose sum is σ = 1320174. Its totient is φ = 1320172.

The previous prime is 1320161. The next prime is 1320181. The reversal of 1320173 is 3710231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1087849 + 232324 = 1043^2 + 482^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320173 - 2⁴ = 1320157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₁₀₁₄₄₇ and since 1320173 and 101447 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660086 + 660087.

It is an arithmetic number, because the mean of its divisors is an integer number (660087).

2^1320173 is an apocalyptic number.

It is an amenable number.

1320173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320173 is an equidigital number, since it uses as much as digits as its factorization.

1320173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 1320173 is about 1148.9878154271. The cubic root of 1320173 is about 109.7009231198.

The spelling of 1320173 in words is "one million, three hundred twenty thousand, one hundred seventy-three".