3515561 has 8 divisors (see below), whose sum is σ = 4034880. Its totient is φ = 3000528.

The previous prime is 3515539. The next prime is 3515587. The reversal of 3515561 is 1655153.

3515561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3515561 - 2¹⁸ = 3253417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3515561.

It is not an unprimeable number, because it can be changed into a prime (3515761) 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 7 ways as a sum of consecutive naturals, for example, 950 + ... + 2816.

It is an arithmetic number, because the mean of its divisors is an integer number (504360).

Almost surely, 2^3515561 is an apocalyptic number.

It is an amenable number.

3515561 is a deficient number, since it is larger than the sum of its proper divisors (519319).

3515561 is a wasteful number, since it uses less digits than its factorization.

3515561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143.

The product of its digits is 2250, while the sum is 26.

The square root of 3515561 is about 1874.9829332557. The cubic root of 3515561 is about 152.0541271912.

The spelling of 3515561 in words is "three million, five hundred fifteen thousand, five hundred sixty-one".