260416521 has 6 divisors (see below), whose sum is σ = 376157210. Its totient is φ = 173611008.

The previous prime is 260416487. The next prime is 260416537. The reversal of 260416521 is 125614062.

260416521 is a `hidden beast` number, since 2 + 6 + 0 + 4 + 1 + 652 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 150921225 + 109495296 = 12285^2 + 10464^2 .

It is not a de Polignac number, because 260416521 - 2⁷ = 260416393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (260416571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14467576 + ... + 14467593.

Almost surely, 2^260416521 is an apocalyptic number.

It is an amenable number.

260416521 is a deficient number, since it is larger than the sum of its proper divisors (115740689).

260416521 is a wasteful number, since it uses less digits than its factorization.

260416521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28935175 (or 28935172 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 260416521 is about 16137.4260958803. The cubic root of 260416521 is about 638.5910745938.

The spelling of 260416521 in words is "two hundred sixty million, four hundred sixteen thousand, five hundred twenty-one".