3521965 has 4 divisors (see below), whose sum is σ = 4226364. Its totient is φ = 2817568.

The previous prime is 3521953. The next prime is 3521977. The reversal of 3521965 is 5691253.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3521953) and next prime (3521977).

It can be written as a sum of positive squares in 2 ways, for example, as 1929321 + 1592644 = 1389^2 + 1262^2 .

It is a cyclic number.

It is not a de Polignac number, because 3521965 - 2⁵ = 3521933 is a prime.

It is a super-2 number, since 2×3521965² = 24808474922450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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, 352192 + ... + 352201.

It is an arithmetic number, because the mean of its divisors is an integer number (1056591).

Almost surely, 2^3521965 is an apocalyptic number.

It is an amenable number.

3521965 is a deficient number, since it is larger than the sum of its proper divisors (704399).

3521965 is an equidigital number, since it uses as much as digits as its factorization.

3521965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704398.

The product of its digits is 8100, while the sum is 31.

The square root of 3521965 is about 1876.6899051255. The cubic root of 3521965 is about 152.1463992315.

The spelling of 3521965 in words is "three million, five hundred twenty-one thousand, nine hundred sixty-five".