260786321 has 2 divisors, whose sum is σ = 260786322. Its totient is φ = 260786320.

The previous prime is 260786297. The next prime is 260786327. The reversal of 260786321 is 123687062.

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., 205492225 + 55294096 = 14335^2 + 7436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260786321 is a prime.

It is not a weakly prime, because it can be changed into another prime (260786327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130393160 + 130393161.

It is an arithmetic number, because the mean of its divisors is an integer number (130393161).

Almost surely, 2^260786321 is an apocalyptic number.

It is an amenable number.

260786321 is a deficient number, since it is larger than the sum of its proper divisors (1).

260786321 is an equidigital number, since it uses as much as digits as its factorization.

260786321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 260786321 is about 16148.8798682757. The cubic root of 260786321 is about 638.8932050499.

The spelling of 260786321 in words is "two hundred sixty million, seven hundred eighty-six thousand, three hundred twenty-one".