4026781 has 8 divisors (see below), whose sum is σ = 4476384. Its totient is φ = 3591120.

The previous prime is 4026751. The next prime is 4026791. The reversal of 4026781 is 1876204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4026781 - 2⁷ = 4026653 is a prime.

It is a super-2 number, since 2×4026781² = 32429930443922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4026721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2871 + ... + 4036.

It is an arithmetic number, because the mean of its divisors is an integer number (559548).

Almost surely, 2^4026781 is an apocalyptic number.

It is an amenable number.

4026781 is a deficient number, since it is larger than the sum of its proper divisors (449603).

4026781 is a wasteful number, since it uses less digits than its factorization.

4026781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6971.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 4026781 is about 2006.6840807661. The cubic root of 4026781 is about 159.0935857163.

The spelling of 4026781 in words is "four million, twenty-six thousand, seven hundred eighty-one".