284540261 has 2 divisors, whose sum is σ = 284540262. Its totient is φ = 284540260.

The previous prime is 284540233. The next prime is 284540293. The reversal of 284540261 is 162045482.

It is an a-pointer prime, because the next prime (284540293) can be obtained adding 284540261 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152152225 + 132388036 = 12335^2 + 11506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284540261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284543261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142270130 + 142270131.

It is an arithmetic number, because the mean of its divisors is an integer number (142270131).

Almost surely, 2^284540261 is an apocalyptic number.

It is an amenable number.

284540261 is a deficient number, since it is larger than the sum of its proper divisors (1).

284540261 is an equidigital number, since it uses as much as digits as its factorization.

284540261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 284540261 is about 16868.3212264884. The cubic root of 284540261 is about 657.7303898479.

The spelling of 284540261 in words is "two hundred eighty-four million, five hundred forty thousand, two hundred sixty-one".