4082921 has 2 divisors, whose sum is σ = 4082922. Its totient is φ = 4082920.

The previous prime is 4082909. The next prime is 4082933. The reversal of 4082921 is 1292804.

It is a balanced prime because it is at equal distance from previous prime (4082909) and next prime (4082933).

It can be written as a sum of positive squares in only one way, i.e., 3857296 + 225625 = 1964^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 4082921 - 2⁶ = 4082857 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4082971) 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, 2041460 + 2041461.

It is an arithmetic number, because the mean of its divisors is an integer number (2041461).

Almost surely, 2^4082921 is an apocalyptic number.

It is an amenable number.

4082921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4082921 is an equidigital number, since it uses as much as digits as its factorization.

4082921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 4082921 is about 2020.6239135475. The cubic root of 4082921 is about 159.8295189366.

The spelling of 4082921 in words is "four million, eighty-two thousand, nine hundred twenty-one".