260521291 has 2 divisors, whose sum is σ = 260521292. Its totient is φ = 260521290.

The previous prime is 260521249. The next prime is 260521307. The reversal of 260521291 is 192125062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 260521291 - 2⁹ = 260520779 is a prime.

It is not a weakly prime, because it can be changed into another prime (260521231) 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, 130260645 + 130260646.

It is an arithmetic number, because the mean of its divisors is an integer number (130260646).

Almost surely, 2^260521291 is an apocalyptic number.

260521291 is a deficient number, since it is larger than the sum of its proper divisors (1).

260521291 is an equidigital number, since it uses as much as digits as its factorization.

260521291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 260521291 is about 16140.6719500769. The cubic root of 260521291 is about 638.6767017989.

The spelling of 260521291 in words is "two hundred sixty million, five hundred twenty-one thousand, two hundred ninety-one".