3520305 has 12 divisors (see below), whose sum is σ = 6101940. Its totient is φ = 1877472.

The previous prime is 3520303. The next prime is 3520333. The reversal of 3520305 is 5030253.

3520305 = 348² + 349² + ... + 374².

It can be written as a sum of positive squares in 2 ways, for example, as 1962801 + 1557504 = 1401^2 + 1248^2 .

It is not a de Polignac number, because 3520305 - 2¹ = 3520303 is a prime.

3520305 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3520303) 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 11 ways as a sum of consecutive naturals, for example, 39070 + ... + 39159.

It is an arithmetic number, because the mean of its divisors is an integer number (508495).

Almost surely, 2^3520305 is an apocalyptic number.

It is an amenable number.

3520305 is a deficient number, since it is larger than the sum of its proper divisors (2581635).

3520305 is a wasteful number, since it uses less digits than its factorization.

3520305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78240 (or 78237 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 18.

The square root of 3520305 is about 1876.2475849418. The cubic root of 3520305 is about 152.1224918661.

Adding to 3520305 its reverse (5030253), we get a palindrome (8550558).

The spelling of 3520305 in words is "three million, five hundred twenty thousand, three hundred five".