3531565 has 4 divisors (see below), whose sum is σ = 4237884. Its totient is φ = 2825248.

The previous prime is 3531559. The next prime is 3531569. The reversal of 3531565 is 5651353.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5651353 = 23 ⋅245711.

It can be written as a sum of positive squares in 2 ways, for example, as 1844164 + 1687401 = 1358^2 + 1299^2 .

It is a cyclic number.

It is not a de Polignac number, because 3531565 - 2¹⁵ = 3498797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3531569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353152 + ... + 353161.

It is an arithmetic number, because the mean of its divisors is an integer number (1059471).

Almost surely, 2^3531565 is an apocalyptic number.

It is an amenable number.

3531565 is a deficient number, since it is larger than the sum of its proper divisors (706319).

3531565 is an equidigital number, since it uses as much as digits as its factorization.

3531565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706318.

The product of its digits is 6750, while the sum is 28.

The square root of 3531565 is about 1879.2458593808. The cubic root of 3531565 is about 152.2845115596.

It can be divided in two parts, 3531 and 565, that added together give a 12-th power (4096 = 2¹²).

The spelling of 3531565 in words is "three million, five hundred thirty-one thousand, five hundred sixty-five".