839421 has 24 divisors (see below), whose sum is σ = 1354080. Its totient is φ = 496800.

The previous prime is 839413. The next prime is 839429. The reversal of 839421 is 124938.

It is an interprime number because it is at equal distance from previous prime (839413) and next prime (839429).

It is not a de Polignac number, because 839421 - 2³ = 839413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (839429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5970 + ... + 6108.

It is an arithmetic number, because the mean of its divisors is an integer number (56420).

2⁸³⁹⁴²¹ is an apocalyptic number.

It is an amenable number.

839421 is a deficient number, since it is larger than the sum of its proper divisors (514659).

839421 is a wasteful number, since it uses less digits than its factorization.

839421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 214 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 839421 is about 916.1992141450. The cubic root of 839421 is about 94.3321956963.

The spelling of 839421 in words is "eight hundred thirty-nine thousand, four hundred twenty-one".