4941821 has 2 divisors, whose sum is σ = 4941822. Its totient is φ = 4941820.

The previous prime is 4941817. The next prime is 4941847. The reversal of 4941821 is 1281494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3290596 + 1651225 = 1814^2 + 1285^2 .

It is a cyclic number.

It is not a de Polignac number, because 4941821 - 2² = 4941817 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 (4941221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2470910 + 2470911.

It is an arithmetic number, because the mean of its divisors is an integer number (2470911).

Almost surely, 2^4941821 is an apocalyptic number.

It is an amenable number.

4941821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4941821 is an equidigital number, since it uses as much as digits as its factorization.

4941821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 29.

The square root of 4941821 is about 2223.0206926612. The cubic root of 4941821 is about 170.3317742292.

The spelling of 4941821 in words is "four million, nine hundred forty-one thousand, eight hundred twenty-one".