4057381 has 2 divisors, whose sum is σ = 4057382. Its totient is φ = 4057380.

The previous prime is 4057379. The next prime is 4057397. The reversal of 4057381 is 1837504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3006756 + 1050625 = 1734^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 4057381 - 2¹ = 4057379 is a prime.

It is a super-2 number, since 2×4057381² = 32924681158322, which contains 22 as substring.

Together with 4057379, it forms a pair of twin primes.

4057381 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4057321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2028690 + 2028691.

It is an arithmetic number, because the mean of its divisors is an integer number (2028691).

Almost surely, 2^4057381 is an apocalyptic number.

It is an amenable number.

4057381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4057381 is an equidigital number, since it uses as much as digits as its factorization.

4057381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 4057381 is about 2014.2941691819. The cubic root of 4057381 is about 159.4955597340.

The spelling of 4057381 in words is "four million, fifty-seven thousand, three hundred eighty-one".