3520506 has 32 divisors (see below), whose sum is σ = 7874496. Its totient is φ = 1040000.

The previous prime is 3520499. The next prime is 3520507. The reversal of 3520506 is 6050253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3520507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2056 + ... + 3356.

It is an arithmetic number, because the mean of its divisors is an integer number (246078).

Almost surely, 2^3520506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3520506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3937248).

3520506 is an abundant number, since it is smaller than the sum of its proper divisors (4353990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3520506 is a wasteful number, since it uses less digits than its factorization.

3520506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 3520506 is about 1876.3011485367. The cubic root of 3520506 is about 152.1253870734.

Adding to 3520506 its reverse (6050253), we get a palindrome (9570759).

The spelling of 3520506 in words is "three million, five hundred twenty thousand, five hundred six".