4061921 has 2 divisors, whose sum is σ = 4061922. Its totient is φ = 4061920.

The previous prime is 4061903. The next prime is 4061923. The reversal of 4061921 is 1291604.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3478225 + 583696 = 1865^2 + 764^2 .

It is a cyclic number.

It is not a de Polignac number, because 4061921 - 2⁶ = 4061857 is a prime.

Together with 4061923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4061923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2030960 + 2030961.

It is an arithmetic number, because the mean of its divisors is an integer number (2030961).

Almost surely, 2^4061921 is an apocalyptic number.

It is an amenable number.

4061921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4061921 is an equidigital number, since it uses as much as digits as its factorization.

4061921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 4061921 is about 2015.4207997339. The cubic root of 4061921 is about 159.5550266601. Note that the first 3 decimals are identical.

The spelling of 4061921 in words is "four million, sixty-one thousand, nine hundred twenty-one".