4068781 has 4 divisors (see below), whose sum is σ = 4200064. Its totient is φ = 3937500.

The previous prime is 4068751. The next prime is 4068811. The reversal of 4068781 is 1878604.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (4068751) and next prime (4068811).

It is a cyclic number.

It is not a de Polignac number, because 4068781 - 2⁵ = 4068749 is a prime.

It is a super-2 number, since 2×4068781² = 33109957651922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4068731) 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 in 3 ways as a sum of consecutive naturals, for example, 65595 + ... + 65656.

It is an arithmetic number, because the mean of its divisors is an integer number (1050016).

Almost surely, 2^4068781 is an apocalyptic number.

It is an amenable number.

4068781 is a deficient number, since it is larger than the sum of its proper divisors (131283).

4068781 is a wasteful number, since it uses less digits than its factorization.

4068781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131282.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 4068781 is about 2017.1219596247. The cubic root of 4068781 is about 159.6447979680.

The spelling of 4068781 in words is "four million, sixty-eight thousand, seven hundred eighty-one".