284721461 has 2 divisors, whose sum is σ = 284721462. Its totient is φ = 284721460.

The previous prime is 284721443. The next prime is 284721469. The reversal of 284721461 is 164127482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284091025 + 630436 = 16855^2 + 794^2 .

It is a cyclic number.

It is not a de Polignac number, because 284721461 - 2¹⁴ = 284705077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284721469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142360730 + 142360731.

It is an arithmetic number, because the mean of its divisors is an integer number (142360731).

Almost surely, 2^284721461 is an apocalyptic number.

It is an amenable number.

284721461 is a deficient number, since it is larger than the sum of its proper divisors (1).

284721461 is an equidigital number, since it uses as much as digits as its factorization.

284721461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 35.

The square root of 284721461 is about 16873.6913862972. The cubic root of 284721461 is about 657.8699781278.

The spelling of 284721461 in words is "two hundred eighty-four million, seven hundred twenty-one thousand, four hundred sixty-one".