4184381 has 4 divisors (see below), whose sum is σ = 4328700. Its totient is φ = 4040064.

The previous prime is 4184377. The next prime is 4184399. The reversal of 4184381 is 1834814.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1834814 = 2 ⋅917407.

It can be written as a sum of positive squares in 2 ways, for example, as 1069156 + 3115225 = 1034^2 + 1765^2 .

It is a cyclic number.

It is not a de Polignac number, because 4184381 - 2² = 4184377 is a prime.

It is a super-2 number, since 2×4184381² = 35018088706322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 144289 = 4184381 / (4 + 1 + 8 + 4 + 3 + 8 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4184311) 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, 72116 + ... + 72173.

It is an arithmetic number, because the mean of its divisors is an integer number (1082175).

Almost surely, 2^4184381 is an apocalyptic number.

It is an amenable number.

4184381 is a deficient number, since it is larger than the sum of its proper divisors (144319).

4184381 is a wasteful number, since it uses less digits than its factorization.

4184381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144318.

The product of its digits is 3072, while the sum is 29.

The square root of 4184381 is about 2045.5759580128. The cubic root of 4184381 is about 161.1426150398.

The spelling of 4184381 in words is "four million, one hundred eighty-four thousand, three hundred eighty-one".