3217561 has 4 divisors (see below), whose sum is σ = 3292432. Its totient is φ = 3142692.

The previous prime is 3217559. The next prime is 3217619. The reversal of 3217561 is 1657123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3217561 - 2¹ = 3217559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3517561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37371 + ... + 37456.

It is an arithmetic number, because the mean of its divisors is an integer number (823108).

Almost surely, 2^3217561 is an apocalyptic number.

It is an amenable number.

3217561 is a deficient number, since it is larger than the sum of its proper divisors (74871).

3217561 is an equidigital number, since it uses as much as digits as its factorization.

3217561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74870.

The product of its digits is 1260, while the sum is 25.

The square root of 3217561 is about 1793.7561149722. The cubic root of 3217561 is about 147.6303319934.

The spelling of 3217561 in words is "three million, two hundred seventeen thousand, five hundred sixty-one".