260678261 has 2 divisors, whose sum is σ = 260678262. Its totient is φ = 260678260.

The previous prime is 260678227. The next prime is 260678279. The reversal of 260678261 is 162876062.

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., 238115761 + 22562500 = 15431^2 + 4750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260678261 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 (260678161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130339130 + 130339131.

It is an arithmetic number, because the mean of its divisors is an integer number (130339131).

Almost surely, 2^260678261 is an apocalyptic number.

It is an amenable number.

260678261 is a deficient number, since it is larger than the sum of its proper divisors (1).

260678261 is an equidigital number, since it uses as much as digits as its factorization.

260678261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 260678261 is about 16145.5337787265. The cubic root of 260678261 is about 638.8049484555.

The spelling of 260678261 in words is "two hundred sixty million, six hundred seventy-eight thousand, two hundred sixty-one".