285466561 has 2 divisors, whose sum is σ = 285466562. Its totient is φ = 285466560.

The previous prime is 285466553. The next prime is 285466609. The reversal of 285466561 is 165664582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256640400 + 28826161 = 16020^2 + 5369^2 .

It is a cyclic number.

It is not a de Polignac number, because 285466561 - 2³ = 285466553 is a prime.

It is not a weakly prime, because it can be changed into another prime (285466541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142733280 + 142733281.

It is an arithmetic number, because the mean of its divisors is an integer number (142733281).

Almost surely, 2^285466561 is an apocalyptic number.

It is an amenable number.

285466561 is a deficient number, since it is larger than the sum of its proper divisors (1).

285466561 is an equidigital number, since it uses as much as digits as its factorization.

285466561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 43.

The square root of 285466561 is about 16895.7557096450. The cubic root of 285466561 is about 658.4433477986.

The spelling of 285466561 in words is "two hundred eighty-five million, four hundred sixty-six thousand, five hundred sixty-one".