4081020 has 48 divisors (see below), whose sum is σ = 12102048. Its totient is φ = 1024000.

The previous prime is 4081019. The next prime is 4081039. The reversal of 4081020 is 201804.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 981 + ... + 3020.

It is an arithmetic number, because the mean of its divisors is an integer number (252126).

Almost surely, 2^4081020 is an apocalyptic number.

It is an amenable number.

4081020 is an abundant number, since it is smaller than the sum of its proper divisors (8021028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4081020 is a wasteful number, since it uses less digits than its factorization.

4081020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030 (or 4028 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 4081020 is about 2020.1534595174. The cubic root of 4081020 is about 159.8047096491.

Adding to 4081020 its reverse (201804), we get a palindrome (4282824).

The spelling of 4081020 in words is "four million, eighty-one thousand, twenty".