3520145 has 4 divisors (see below), whose sum is σ = 4224180. Its totient is φ = 2816112.

The previous prime is 3520141. The next prime is 3520147. The reversal of 3520145 is 5410253.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2362369 + 1157776 = 1537^2 + 1076^2 .

It is a cyclic number.

It is not a de Polignac number, because 3520145 - 2² = 3520141 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (3520141) 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, 352010 + ... + 352019.

It is an arithmetic number, because the mean of its divisors is an integer number (1056045).

Almost surely, 2^3520145 is an apocalyptic number.

It is an amenable number.

3520145 is a deficient number, since it is larger than the sum of its proper divisors (704035).

3520145 is an equidigital number, since it uses as much as digits as its factorization.

3520145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704034.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 3520145 is about 1876.2049461613. The cubic root of 3520145 is about 152.1201871446.

Adding to 3520145 its reverse (5410253), we get a palindrome (8930398).

The spelling of 3520145 in words is "three million, five hundred twenty thousand, one hundred forty-five".