285367261 has 2 divisors, whose sum is σ = 285367262. Its totient is φ = 285367260.

The previous prime is 285367259. The next prime is 285367309. The reversal of 285367261 is 162763582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260176900 + 25190361 = 16130^2 + 5019^2 .

It is a cyclic number.

It is not a de Polignac number, because 285367261 - 2¹ = 285367259 is a prime.

Together with 285367259, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285367231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142683630 + 142683631.

It is an arithmetic number, because the mean of its divisors is an integer number (142683631).

Almost surely, 2^285367261 is an apocalyptic number.

It is an amenable number.

285367261 is a deficient number, since it is larger than the sum of its proper divisors (1).

285367261 is an equidigital number, since it uses as much as digits as its factorization.

285367261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 285367261 is about 16892.8168462219. The cubic root of 285367261 is about 658.3669920871.

The spelling of 285367261 in words is "two hundred eighty-five million, three hundred sixty-seven thousand, two hundred sixty-one".