6446249 has 4 divisors (see below), whose sum is σ = 6462420. Its totient is φ = 6430080.

The previous prime is 6446243. The next prime is 6446257. The reversal of 6446249 is 9426446.

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 5107600 + 1338649 = 2260^2 + 1157^2 .

It is a cyclic number.

It is not a de Polignac number, because 6446249 - 2⁸ = 6445993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7472 + ... + 8289.

It is an arithmetic number, because the mean of its divisors is an integer number (1615605).

Almost surely, 2^6446249 is an apocalyptic number.

It is an amenable number.

6446249 is a deficient number, since it is larger than the sum of its proper divisors (16171).

6446249 is a wasteful number, since it uses less digits than its factorization.

6446249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16170.

The product of its digits is 41472, while the sum is 35.

The square root of 6446249 is about 2538.9464350395. The cubic root of 6446249 is about 186.1097071221.

The spelling of 6446249 in words is "six million, four hundred forty-six thousand, two hundred forty-nine".