6481209 has 16 divisors (see below), whose sum is σ = 10045440. Its totient is φ = 3640080.

The previous prime is 6481207. The next prime is 6481217. The reversal of 6481209 is 9021846.

6481209 = 302² + 303² + ... + 360².

6481209 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6481209 - 2¹ = 6481207 is a prime.

6481209 is strictly pandigital in base 8.

It is a Curzon number.

6481209 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6481207) 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, 1377 + ... + 3854.

It is an arithmetic number, because the mean of its divisors is an integer number (627840).

Almost surely, 2^6481209 is an apocalyptic number.

It is an amenable number.

6481209 is a deficient number, since it is larger than the sum of its proper divisors (3564231).

6481209 is a wasteful number, since it uses less digits than its factorization.

6481209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5300.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 6481209 is about 2545.8218712235. The cubic root of 6481209 is about 186.4455442168.

The spelling of 6481209 in words is "six million, four hundred eighty-one thousand, two hundred nine".