381149 has 4 divisors (see below), whose sum is σ = 384636. Its totient is φ = 377664.

The previous prime is 381103. The next prime is 381167. The reversal of 381149 is 941183.

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 196249 + 184900 = 443^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 381149 - 2¹⁶ = 315613 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381149.

It is not an unprimeable number, because it can be changed into a prime (381169) 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, 1574 + ... + 1799.

It is an arithmetic number, because the mean of its divisors is an integer number (96159).

2³⁸¹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

381149 is a deficient number, since it is larger than the sum of its proper divisors (3487).

381149 is a wasteful number, since it uses less digits than its factorization.

381149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486.

The product of its digits is 864, while the sum is 26.

The square root of 381149 is about 617.3726589346. The cubic root of 381149 is about 72.5044943706.

The spelling of 381149 in words is "three hundred eighty-one thousand, one hundred forty-nine".