260525609 has 2 divisors, whose sum is σ = 260525610. Its totient is φ = 260525608.

The previous prime is 260525597. The next prime is 260525611. The reversal of 260525609 is 906525062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259210000 + 1315609 = 16100^2 + 1147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260525609 is a prime.

Together with 260525611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (260525659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130262804 + 130262805.

It is an arithmetic number, because the mean of its divisors is an integer number (130262805).

Almost surely, 2^260525609 is an apocalyptic number.

It is an amenable number.

260525609 is a deficient number, since it is larger than the sum of its proper divisors (1).

260525609 is an equidigital number, since it uses as much as digits as its factorization.

260525609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 260525609 is about 16140.8057109922. The cubic root of 260525609 is about 638.6802303534.

The spelling of 260525609 in words is "two hundred sixty million, five hundred twenty-five thousand, six hundred nine".