4007681 has 8 divisors (see below), whose sum is σ = 4211520. Its totient is φ = 3806352.

The previous prime is 4007677. The next prime is 4007687. The reversal of 4007681 is 1867004.

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 4007681 - 2² = 4007677 is a prime.

It is a super-2 number, since 2×4007681² = 32123013995522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4007681.

It is not an unprimeable number, because it can be changed into a prime (4007687) 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, 3215 + ... + 4283.

It is an arithmetic number, because the mean of its divisors is an integer number (526440).

Almost surely, 2^4007681 is an apocalyptic number.

It is an amenable number.

4007681 is a deficient number, since it is larger than the sum of its proper divisors (203839).

4007681 is a wasteful number, since it uses less digits than its factorization.

4007681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 4007681 is about 2001.9193290440. The cubic root of 4007681 is about 158.8416471249.

The spelling of 4007681 in words is "four million, seven thousand, six hundred eighty-one".