4010921 has 2 divisors, whose sum is σ = 4010922. Its totient is φ = 4010920.

The previous prime is 4010893. The next prime is 4010927. The reversal of 4010921 is 1290104.

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., 3463321 + 547600 = 1861^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 4010921 - 2⁶ = 4010857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4010921.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4010927) 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, 2005460 + 2005461.

It is an arithmetic number, because the mean of its divisors is an integer number (2005461).

Almost surely, 2^4010921 is an apocalyptic number.

It is an amenable number.

4010921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4010921 is an equidigital number, since it uses as much as digits as its factorization.

4010921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 4010921 is about 2002.7283889734. The cubic root of 4010921 is about 158.8844406432.

The spelling of 4010921 in words is "four million, ten thousand, nine hundred twenty-one".