3561020 has 24 divisors (see below), whose sum is σ = 7517664. Its totient is φ = 1416896.

The previous prime is 3560993. The next prime is 3561023. The reversal of 3561020 is 201653.

It is a self number, because there is not a number n which added to its sum of digits gives 3561020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4922 + ... + 5598.

It is an arithmetic number, because the mean of its divisors is an integer number (313236).

Almost surely, 2^3561020 is an apocalyptic number.

It is an amenable number.

3561020 is an abundant number, since it is smaller than the sum of its proper divisors (3956644).

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

3561020 is a wasteful number, since it uses less digits than its factorization.

3561020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 947 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 3561020 is about 1887.0665065122. The cubic root of 3561020 is about 152.7067159940.

Adding to 3561020 its reverse (201653), we get a palindrome (3762673).

The spelling of 3561020 in words is "three million, five hundred sixty-one thousand, twenty".