4000015 has 8 divisors (see below), whose sum is σ = 5082480. Its totient is φ = 3011712.

The previous prime is 3999971. The next prime is 4000037. The reversal of 4000015 is 5100004.

4000015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4000015 - 2¹¹ = 3997967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3999965 and 4000010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23445 + ... + 23614.

It is an arithmetic number, because the mean of its divisors is an integer number (635310).

Almost surely, 2^4000015 is an apocalyptic number.

4000015 is a deficient number, since it is larger than the sum of its proper divisors (1082465).

4000015 is a wasteful number, since it uses less digits than its factorization.

4000015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47081.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 4000015 is about 2000.0037499965. The cubic root of 4000015 is about 158.7403036217.

Adding to 4000015 its reverse (5100004), we get a palindrome (9100019).

The spelling of 4000015 in words is "four million, fifteen", and thus it is an aban number.