260644541 has 2 divisors, whose sum is σ = 260644542. Its totient is φ = 260644540.

The previous prime is 260644519. The next prime is 260644577. The reversal of 260644541 is 145446062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250747225 + 9897316 = 15835^2 + 3146^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260644541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 260644498 and 260644507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260644511) 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, 130322270 + 130322271.

It is an arithmetic number, because the mean of its divisors is an integer number (130322271).

Almost surely, 2^260644541 is an apocalyptic number.

It is an amenable number.

260644541 is a deficient number, since it is larger than the sum of its proper divisors (1).

260644541 is an equidigital number, since it uses as much as digits as its factorization.

260644541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 260644541 is about 16144.4894933225. The cubic root of 260644541 is about 638.7774030929. Note that the first 3 decimals are identical.

The spelling of 260644541 in words is "two hundred sixty million, six hundred forty-four thousand, five hundred forty-one".