3581020 has 12 divisors (see below), whose sum is σ = 7520184. Its totient is φ = 1432400.

The previous prime is 3581003. The next prime is 3581021. The reversal of 3581020 is 201853.

It is a happy number.

3581020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3581021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 89506 + ... + 89545.

It is an arithmetic number, because the mean of its divisors is an integer number (626682).

Almost surely, 2^3581020 is an apocalyptic number.

It is an amenable number.

3581020 is an abundant number, since it is smaller than the sum of its proper divisors (3939164).

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

3581020 is a wasteful number, since it uses less digits than its factorization.

3581020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179060 (or 179058 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 3581020 is about 1892.3583170214. The cubic root of 3581020 is about 152.9920681664.

Adding to 3581020 its reverse (201853), we get a palindrome (3782873).

It can be divided in two parts, 358 and 1020, that added together give a triangular number (1378 = T₅₂).

The spelling of 3581020 in words is "three million, five hundred eighty-one thousand, twenty".