6439481 has 4 divisors (see below), whose sum is σ = 6818292. Its totient is φ = 6060672.

The previous prime is 6439469. The next prime is 6439483. The reversal of 6439481 is 1849346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4141225 + 2298256 = 2035^2 + 1516^2 .

It is a cyclic number.

It is not a de Polignac number, because 6439481 - 2¹⁰ = 6438457 is a prime.

It is a super-2 number, since 2×6439481² = 82933831098722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6439483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189380 + ... + 189413.

It is an arithmetic number, because the mean of its divisors is an integer number (1704573).

Almost surely, 2^6439481 is an apocalyptic number.

It is an amenable number.

6439481 is a deficient number, since it is larger than the sum of its proper divisors (378811).

6439481 is a wasteful number, since it uses less digits than its factorization.

6439481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378810.

The product of its digits is 20736, while the sum is 35.

The square root of 6439481 is about 2537.6132487044. The cubic root of 6439481 is about 186.0445513198.

The spelling of 6439481 in words is "six million, four hundred thirty-nine thousand, four hundred eighty-one".