4910921 has 2 divisors, whose sum is σ = 4910922. Its totient is φ = 4910920.

The previous prime is 4910897. The next prime is 4910953. The reversal of 4910921 is 1290194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4145296 + 765625 = 2036^2 + 875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4910921 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4910981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2455460 + 2455461.

It is an arithmetic number, because the mean of its divisors is an integer number (2455461).

Almost surely, 2^4910921 is an apocalyptic number.

It is an amenable number.

4910921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4910921 is an equidigital number, since it uses as much as digits as its factorization.

4910921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 4910921 is about 2216.0597916121. The cubic root of 4910921 is about 169.9760173781.

The spelling of 4910921 in words is "four million, nine hundred ten thousand, nine hundred twenty-one".