1173281 has 2 divisors, whose sum is σ = 1173282. Its totient is φ = 1173280.

The previous prime is 1173259. The next prime is 1173283. The reversal of 1173281 is 1823711.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 625681 + 547600 = 791^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 1173281 - 2¹⁰ = 1172257 is a prime.

It is a super-2 number, since 2×1173281² = 2753176609922, which contains 22 as substring.

Together with 1173283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1173283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586640 + 586641.

It is an arithmetic number, because the mean of its divisors is an integer number (586641).

2^1173281 is an apocalyptic number.

It is an amenable number.

1173281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1173281 is an equidigital number, since it uses as much as digits as its factorization.

1173281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 23.

The square root of 1173281 is about 1083.1809636437. The cubic root of 1173281 is about 105.4712304474.

Adding to 1173281 its reverse (1823711), we get a palindrome (2996992).

The spelling of 1173281 in words is "one million, one hundred seventy-three thousand, two hundred eighty-one".