284420261 has 2 divisors, whose sum is σ = 284420262. Its totient is φ = 284420260.

The previous prime is 284420243. The next prime is 284420267. The reversal of 284420261 is 162024482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268468225 + 15952036 = 16385^2 + 3994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284420261 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 (284420267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142210130 + 142210131.

It is an arithmetic number, because the mean of its divisors is an integer number (142210131).

Almost surely, 2^284420261 is an apocalyptic number.

It is an amenable number.

284420261 is a deficient number, since it is larger than the sum of its proper divisors (1).

284420261 is an equidigital number, since it uses as much as digits as its factorization.

284420261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 284420261 is about 16864.7638880596. The cubic root of 284420261 is about 657.6379146570.

The spelling of 284420261 in words is "two hundred eighty-four million, four hundred twenty thousand, two hundred sixty-one".