6421031 has 4 divisors (see below), whose sum is σ = 6759000. Its totient is φ = 6083064.

The previous prime is 6421021. The next prime is 6421039. The reversal of 6421031 is 1301246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1301246 = 2 ⋅650623.

It is a cyclic number.

It is not a de Polignac number, because 6421031 - 2¹⁴ = 6404647 is a prime.

It is a super-2 number, since 2×6421031² = 82459278205922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421039) 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, 168956 + ... + 168993.

It is an arithmetic number, because the mean of its divisors is an integer number (1689750).

Almost surely, 2^6421031 is an apocalyptic number.

6421031 is a deficient number, since it is larger than the sum of its proper divisors (337969).

6421031 is a wasteful number, since it uses less digits than its factorization.

6421031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337968.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 6421031 is about 2533.9753353180. The cubic root of 6421031 is about 185.8667002675.

Adding to 6421031 its reverse (1301246), we get a palindrome (7722277).

The spelling of 6421031 in words is "six million, four hundred twenty-one thousand, thirty-one".