285214861 has 2 divisors, whose sum is σ = 285214862. Its totient is φ = 285214860.

The previous prime is 285214799. The next prime is 285214877. The reversal of 285214861 is 168412582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275759236 + 9455625 = 16606^2 + 3075^2 .

It is a cyclic number.

It is not a de Polignac number, because 285214861 - 2⁷ = 285214733 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285214861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285214261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142607430 + 142607431.

It is an arithmetic number, because the mean of its divisors is an integer number (142607431).

Almost surely, 2^285214861 is an apocalyptic number.

It is an amenable number.

285214861 is a deficient number, since it is larger than the sum of its proper divisors (1).

285214861 is an equidigital number, since it uses as much as digits as its factorization.

285214861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 37.

The square root of 285214861 is about 16888.3054508142. The cubic root of 285214861 is about 658.2497712166.

The spelling of 285214861 in words is "two hundred eighty-five million, two hundred fourteen thousand, eight hundred sixty-one".