260725609 has 9 divisors (see below), whose sum is σ = 265777911. Its totient is φ = 255768480.

The previous prime is 260725571. The next prime is 260725649. The reversal of 260725609 is 906527062.

The square root of 260725609 is 16147.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 196084009 + 64641600 = 14003^2 + 8040^2 .

It is not a de Polignac number, because 260725609 - 2²⁵ = 227171177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260725649) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1081729 + ... + 1081969.

It is an arithmetic number, because the mean of its divisors is an integer number (29530879).

Almost surely, 2^260725609 is an apocalyptic number.

260725609 is the 16147-th square number.

260725609 is the 8074-th centered octagonal number.

It is an amenable number.

260725609 is a deficient number, since it is larger than the sum of its proper divisors (5052302).

260725609 is an frugal number, since it uses more digits than its factorization.

260725609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The cubic root of 260725609 is about 638.8436223180.

The spelling of 260725609 in words is "two hundred sixty million, seven hundred twenty-five thousand, six hundred nine".