4020615 has 24 divisors (see below), whose sum is σ = 7121088. Its totient is φ = 2097600.

The previous prime is 4020593. The next prime is 4020617. The reversal of 4020615 is 5160204.

It is a happy number.

It is not a de Polignac number, because 4020615 - 2¹⁰ = 4019591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020617) 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 23 ways as a sum of consecutive naturals, for example, 1165 + ... + 3065.

It is an arithmetic number, because the mean of its divisors is an integer number (296712).

Almost surely, 2^4020615 is an apocalyptic number.

4020615 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

4020615 is a deficient number, since it is larger than the sum of its proper divisors (3100473).

4020615 is a wasteful number, since it uses less digits than its factorization.

4020615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959 (or 1956 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 4020615 is about 2005.1471267715. The cubic root of 4020615 is about 159.0123403262.

Adding to 4020615 its reverse (5160204), we get a palindrome (9180819).

The spelling of 4020615 in words is "four million, twenty thousand, six hundred fifteen".