260196721 has 2 divisors, whose sum is σ = 260196722. Its totient is φ = 260196720.

The previous prime is 260196719. The next prime is 260196743. The reversal of 260196721 is 127691062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229825600 + 30371121 = 15160^2 + 5511^2 .

It is a cyclic number.

It is not a de Polignac number, because 260196721 - 2¹ = 260196719 is a prime.

Together with 260196719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (260196791) 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, 130098360 + 130098361.

It is an arithmetic number, because the mean of its divisors is an integer number (130098361).

Almost surely, 2^260196721 is an apocalyptic number.

It is an amenable number.

260196721 is a deficient number, since it is larger than the sum of its proper divisors (1).

260196721 is an equidigital number, since it uses as much as digits as its factorization.

260196721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 260196721 is about 16130.6144024337. The cubic root of 260196721 is about 638.4113601549.

It can be divided in two parts, 2601 and 96721, that multiplied together give a square (251571321 = 15861²).

The spelling of 260196721 in words is "two hundred sixty million, one hundred ninety-six thousand, seven hundred twenty-one".