6381449 has 4 divisors (see below), whose sum is σ = 6438036. Its totient is φ = 6324864.

The previous prime is 6381437. The next prime is 6381457. The reversal of 6381449 is 9441836.

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 1836025 + 4545424 = 1355^2 + 2132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6381449 is a prime.

It is a d-powerful number, because it can be written as 6² + 3¹³ + 8 + 1 + 4² + 4⁶ + 9⁷ .

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6381469) 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, 28124 + ... + 28349.

It is an arithmetic number, because the mean of its divisors is an integer number (1609509).

Almost surely, 2^6381449 is an apocalyptic number.

It is an amenable number.

6381449 is a deficient number, since it is larger than the sum of its proper divisors (56587).

6381449 is a wasteful number, since it uses less digits than its factorization.

6381449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56586.

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

The square root of 6381449 is about 2526.1530040756. The cubic root of 6381449 is about 185.4839920024.

The spelling of 6381449 in words is "six million, three hundred eighty-one thousand, four hundred forty-nine".