1280173 has 2 divisors, whose sum is σ = 1280174. Its totient is φ = 1280172.

The previous prime is 1280161. The next prime is 1280179. The reversal of 1280173 is 3710821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1261129 + 19044 = 1123^2 + 138^2 .

It is an emirp because it is prime and its reverse (3710821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1280173 - 2⁵ = 1280141 is a prime.

It is a super-3 number, since 3×1280173³ = 6294007333597613151, which contains 333 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640086 + 640087.

It is an arithmetic number, because the mean of its divisors is an integer number (640087).

2^1280173 is an apocalyptic number.

It is an amenable number.

1280173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280173 is an equidigital number, since it uses as much as digits as its factorization.

1280173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1280173 is about 1131.4473032360. The cubic root of 1280173 is about 108.5815960502.

Adding to 1280173 its reverse (3710821), we get a palindrome (4990994).

The spelling of 1280173 in words is "one million, two hundred eighty thousand, one hundred seventy-three".