4278381 has 4 divisors (see below), whose sum is σ = 5704512. Its totient is φ = 2852252.

The previous prime is 4278377. The next prime is 4278383. The reversal of 4278381 is 1838724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4278381 - 2² = 4278377 is a prime.

It is a super-2 number, since 2×4278381² = 36609087962322, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4278383) 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, 713061 + ... + 713066.

It is an arithmetic number, because the mean of its divisors is an integer number (1426128).

Almost surely, 2^4278381 is an apocalyptic number.

It is an amenable number.

4278381 is a deficient number, since it is larger than the sum of its proper divisors (1426131).

4278381 is a wasteful number, since it uses less digits than its factorization.

4278381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426130.

The product of its digits is 10752, while the sum is 33.

The square root of 4278381 is about 2068.4247629537. The cubic root of 4278381 is about 162.3403528717.

The spelling of 4278381 in words is "four million, two hundred seventy-eight thousand, three hundred eighty-one".