4027381 has 2 divisors, whose sum is σ = 4027382. Its totient is φ = 4027380.

The previous prime is 4027379. The next prime is 4027391. The reversal of 4027381 is 1837204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2452356 + 1575025 = 1566^2 + 1255^2 .

It is a cyclic number.

It is not a de Polignac number, because 4027381 - 2¹ = 4027379 is a prime.

It is a super-2 number, since 2×4027381² = 32439595438322, which contains 22 as substring.

Together with 4027379, it forms a pair of twin primes.

4027381 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4027391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2013690 + 2013691.

It is an arithmetic number, because the mean of its divisors is an integer number (2013691).

Almost surely, 2^4027381 is an apocalyptic number.

It is an amenable number.

4027381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4027381 is an equidigital number, since it uses as much as digits as its factorization.

4027381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 4027381 is about 2006.8335755613. The cubic root of 4027381 is about 159.1014870988.

The spelling of 4027381 in words is "four million, twenty-seven thousand, three hundred eighty-one".