940921 has 2 divisors, whose sum is σ = 940922. Its totient is φ = 940920.

The previous prime is 940913. The next prime is 940931. The reversal of 940921 is 129049.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 921600 + 19321 = 960^2 + 139^2 .

It is an emirp because it is prime and its reverse (129049) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 940921 - 2³ = 940913 is a prime.

It is a super-3 number, since 3×940921³ = 2499083338862549883, which contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (940931) 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, 470460 + 470461.

It is an arithmetic number, because the mean of its divisors is an integer number (470461).

2⁹⁴⁰⁹²¹ is an apocalyptic number.

It is an amenable number.

940921 is a deficient number, since it is larger than the sum of its proper divisors (1).

940921 is an equidigital number, since it uses as much as digits as its factorization.

940921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 940921 is about 970.0108246819. The cubic root of 940921 is about 97.9905932940.

The spelling of 940921 in words is "nine hundred forty thousand, nine hundred twenty-one".