4042286921 has 2 divisors, whose sum is σ = 4042286922. Its totient is φ = 4042286920.

The previous prime is 4042286891. The next prime is 4042286929. The reversal of 4042286921 is 1296822404.

It is a happy number.

4042286921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3276990025 + 765296896 = 57245^2 + 27664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4042286921 is a prime.

It is not a weakly prime, because it can be changed into another prime (4042286929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2021143460 + 2021143461.

It is an arithmetic number, because the mean of its divisors is an integer number (2021143461).

Almost surely, 2^4042286921 is an apocalyptic number.

It is an amenable number.

4042286921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4042286921 is an equidigital number, since it uses as much as digits as its factorization.

4042286921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 4042286921 is about 63578.9817549794. The cubic root of 4042286921 is about 1592.9753132509.

The spelling of 4042286921 in words is "four billion, forty-two million, two hundred eighty-six thousand, nine hundred twenty-one".