381449 has 4 divisors (see below), whose sum is σ = 383760. Its totient is φ = 379140.

The previous prime is 381443. The next prime is 381461. The reversal of 381449 is 944183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 944183 = 47 ⋅20089.

It is a cyclic number.

It is not a de Polignac number, because 381449 - 2¹² = 377353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381443) 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, 887 + ... + 1244.

It is an arithmetic number, because the mean of its divisors is an integer number (95940).

2³⁸¹⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

381449 is a deficient number, since it is larger than the sum of its proper divisors (2311).

381449 is a wasteful number, since it uses less digits than its factorization.

381449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310.

The product of its digits is 3456, while the sum is 29.

The square root of 381449 is about 617.6155762284. The cubic root of 381449 is about 72.5235119937.

The spelling of 381449 in words is "three hundred eighty-one thousand, four hundred forty-nine".