254846821 has 2 divisors, whose sum is σ = 254846822. Its totient is φ = 254846820.

The previous prime is 254846807. The next prime is 254846827. The reversal of 254846821 is 128648452.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253128100 + 1718721 = 15910^2 + 1311^2 .

It is a cyclic number.

It is not a de Polignac number, because 254846821 - 2⁵ = 254846789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254846827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127423410 + 127423411.

It is an arithmetic number, because the mean of its divisors is an integer number (127423411).

Almost surely, 2^254846821 is an apocalyptic number.

It is an amenable number.

254846821 is a deficient number, since it is larger than the sum of its proper divisors (1).

254846821 is an equidigital number, since it uses as much as digits as its factorization.

254846821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122880, while the sum is 40.

The square root of 254846821 is about 15963.9224816459. The cubic root of 254846821 is about 634.0055702125.

The spelling of 254846821 in words is "two hundred fifty-four million, eight hundred forty-six thousand, eight hundred twenty-one".