260947561 has 8 divisors (see below), whose sum is σ = 299529920. Its totient is φ = 222691248.

The previous prime is 260947549. The next prime is 260947613. The reversal of 260947561 is 165749062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 260947561 - 2⁵ = 260947529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260947541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79791 + ... + 82996.

It is an arithmetic number, because the mean of its divisors is an integer number (37441240).

Almost surely, 2^260947561 is an apocalyptic number.

It is an amenable number.

260947561 is a deficient number, since it is larger than the sum of its proper divisors (38582359).

260947561 is a wasteful number, since it uses less digits than its factorization.

260947561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163023.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 260947561 is about 16153.8713935700. The cubic root of 260947561 is about 639.0248503964.

The spelling of 260947561 in words is "two hundred sixty million, nine hundred forty-seven thousand, five hundred sixty-one".