250816121 has 2 divisors, whose sum is σ = 250816122. Its totient is φ = 250816120.

The previous prime is 250816117. The next prime is 250816129. The reversal of 250816121 is 121618052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200618896 + 50197225 = 14164^2 + 7085^2 .

It is a cyclic number.

It is not a de Polignac number, because 250816121 - 2² = 250816117 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (250816129) 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, 125408060 + 125408061.

It is an arithmetic number, because the mean of its divisors is an integer number (125408061).

Almost surely, 2^250816121 is an apocalyptic number.

It is an amenable number.

250816121 is a deficient number, since it is larger than the sum of its proper divisors (1).

250816121 is an equidigital number, since it uses as much as digits as its factorization.

250816121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 250816121 is about 15837.1752847533. The cubic root of 250816121 is about 630.6452790489.

The spelling of 250816121 in words is "two hundred fifty million, eight hundred sixteen thousand, one hundred twenty-one".