4020015 has 16 divisors (see below), whose sum is σ = 6461568. Its totient is φ = 2134176.

The previous prime is 4020011. The next prime is 4020017. The reversal of 4020015 is 5100204.

It is not a de Polignac number, because 4020015 - 2² = 4020011 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3772 + ... + 4718.

It is an arithmetic number, because the mean of its divisors is an integer number (403848).

Almost surely, 2^4020015 is an apocalyptic number.

4020015 is a deficient number, since it is larger than the sum of its proper divisors (2441553).

4020015 is a wasteful number, since it uses less digits than its factorization.

4020015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 4020015 is about 2004.9975062329. The cubic root of 4020015 is about 159.0044300811.

Adding to 4020015 its reverse (5100204), we get a palindrome (9120219).

The spelling of 4020015 in words is "four million, twenty thousand, fifteen".