1172880281 has 2 divisors, whose sum is σ = 1172880282. Its totient is φ = 1172880280.

The previous prime is 1172880277. The next prime is 1172880283. The reversal of 1172880281 is 1820882711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1172377600 + 502681 = 34240^2 + 709^2 .

It is a cyclic number.

It is not a de Polignac number, because 1172880281 - 2² = 1172880277 is a prime.

It is a super-2 number, since 2×1172880281² = 2751296307117277922, which contains 22 as substring.

Together with 1172880283, 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 (1172880283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586440140 + 586440141.

It is an arithmetic number, because the mean of its divisors is an integer number (586440141).

Almost surely, 2^1172880281 is an apocalyptic number.

It is an amenable number.

1172880281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172880281 is an equidigital number, since it uses as much as digits as its factorization.

1172880281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 38.

The square root of 1172880281 is about 34247.3397653015. The cubic root of 1172880281 is about 1054.5922163377.

The spelling of 1172880281 in words is "one billion, one hundred seventy-two million, eight hundred eighty thousand, two hundred eighty-one".