260782721 has 4 divisors (see below), whose sum is σ = 260818992. Its totient is φ = 260746452.

The previous prime is 260782679. The next prime is 260782723. The reversal of 260782721 is 127287062.

260782721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260782721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260782723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3311 + ... + 23076.

It is an arithmetic number, because the mean of its divisors is an integer number (65204748).

Almost surely, 2^260782721 is an apocalyptic number.

It is an amenable number.

260782721 is a deficient number, since it is larger than the sum of its proper divisors (36271).

260782721 is an equidigital number, since it uses as much as digits as its factorization.

260782721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36270.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 260782721 is about 16148.7684050518. The cubic root of 260782721 is about 638.8902651895.

The spelling of 260782721 in words is "two hundred sixty million, seven hundred eighty-two thousand, seven hundred twenty-one".