3561216 has 36 divisors (see below), whose sum is σ = 9480072. Its totient is φ = 1186816.

The previous prime is 3561209. The next prime is 3561221. The reversal of 3561216 is 6121653.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1551 + ... + 3086.

Almost surely, 2^3561216 is an apocalyptic number.

It is an amenable number.

3561216 is an abundant number, since it is smaller than the sum of its proper divisors (5918856).

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

3561216 is an equidigital number, since it uses as much as digits as its factorization.

3561216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4656 (or 4642 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 3561216 is about 1887.1184382545. The cubic root of 3561216 is about 152.7095176226.

Adding to 3561216 its reverse (6121653), we get a palindrome (9682869).

The spelling of 3561216 in words is "three million, five hundred sixty-one thousand, two hundred sixteen".