4256381 has 2 divisors, whose sum is σ = 4256382. Its totient is φ = 4256380.

The previous prime is 4256347. The next prime is 4256383. The reversal of 4256381 is 1836524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4239481 + 16900 = 2059^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 4256381 - 2¹⁴ = 4239997 is a prime.

It is a super-2 number, since 2×4256381² = 36233558434322, which contains 22 as substring.

Together with 4256383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4256383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2128190 + 2128191.

It is an arithmetic number, because the mean of its divisors is an integer number (2128191).

Almost surely, 2^4256381 is an apocalyptic number.

It is an amenable number.

4256381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4256381 is an equidigital number, since it uses as much as digits as its factorization.

4256381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 4256381 is about 2063.0998521642. The cubic root of 4256381 is about 162.0616160475.

The spelling of 4256381 in words is "four million, two hundred fifty-six thousand, three hundred eighty-one".