260790221 has 2 divisors, whose sum is σ = 260790222. Its totient is φ = 260790220.

The previous prime is 260790193. The next prime is 260790247. The reversal of 260790221 is 122097062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224670121 + 36120100 = 14989^2 + 6010^2 .

It is a cyclic number.

It is not a de Polignac number, because 260790221 - 2¹⁴ = 260773837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260790281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130395110 + 130395111.

It is an arithmetic number, because the mean of its divisors is an integer number (130395111).

Almost surely, 2^260790221 is an apocalyptic number.

It is an amenable number.

260790221 is a deficient number, since it is larger than the sum of its proper divisors (1).

260790221 is an equidigital number, since it uses as much as digits as its factorization.

260790221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 260790221 is about 16149.0006192334. Note that the first 3 decimals coincide. The cubic root of 260790221 is about 638.8963898681.

The spelling of 260790221 in words is "two hundred sixty million, seven hundred ninety thousand, two hundred twenty-one".