939021 has 16 divisors (see below), whose sum is σ = 1351680. Its totient is φ = 578160.

The previous prime is 939019. The next prime is 939061. The reversal of 939021 is 120939.

939021 = 319² + 320² + ... + 327².

It is a happy number.

It is not a de Polignac number, because 939021 - 2¹ = 939019 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 938982 and 939000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1920 + ... + 2358.

It is an arithmetic number, because the mean of its divisors is an integer number (84480).

2⁹³⁹⁰²¹ is an apocalyptic number.

It is an amenable number.

939021 is a deficient number, since it is larger than the sum of its proper divisors (412659).

939021 is a wasteful number, since it uses less digits than its factorization.

939021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 939021 is about 969.0309592578. The cubic root of 939021 is about 97.9245914415.

The spelling of 939021 in words is "nine hundred thirty-nine thousand, twenty-one".