4050821 has 2 divisors, whose sum is σ = 4050822. Its totient is φ = 4050820.

The previous prime is 4050793. The next prime is 4050833. The reversal of 4050821 is 1280504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2937796 + 1113025 = 1714^2 + 1055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4050821 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4050793 and 4050802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4050121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2025410 + 2025411.

It is an arithmetic number, because the mean of its divisors is an integer number (2025411).

Almost surely, 2^4050821 is an apocalyptic number.

It is an amenable number.

4050821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4050821 is an equidigital number, since it uses as much as digits as its factorization.

4050821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 4050821 is about 2012.6651485033. The cubic root of 4050821 is about 159.4095555470.

The spelling of 4050821 in words is "four million, fifty thousand, eight hundred twenty-one".