5639421 has 4 divisors (see below), whose sum is σ = 7519232. Its totient is φ = 3759612.

The previous prime is 5639411. The next prime is 5639453. The reversal of 5639421 is 1249365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5639421 - 2⁶ = 5639357 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5639411) 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 in 3 ways as a sum of consecutive naturals, for example, 939901 + ... + 939906.

It is an arithmetic number, because the mean of its divisors is an integer number (1879808).

Almost surely, 2^5639421 is an apocalyptic number.

It is an amenable number.

5639421 is a deficient number, since it is larger than the sum of its proper divisors (1879811).

5639421 is a wasteful number, since it uses less digits than its factorization.

5639421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879810.

The product of its digits is 6480, while the sum is 30.

The square root of 5639421 is about 2374.7465127883. The cubic root of 5639421 is about 177.9965176274.

The spelling of 5639421 in words is "five million, six hundred thirty-nine thousand, four hundred twenty-one".