3521646 has 24 divisors (see below), whose sum is σ = 7679880. Its totient is φ = 1166256.

The previous prime is 3521633. The next prime is 3521653. The reversal of 3521646 is 6461253.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2676 + ... + 3768.

It is an arithmetic number, because the mean of its divisors is an integer number (319995).

Almost surely, 2^3521646 is an apocalyptic number.

3521646 is an abundant number, since it is smaller than the sum of its proper divisors (4158234).

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

3521646 is a wasteful number, since it uses less digits than its factorization.

3521646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280 (or 1277 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 3521646 is about 1876.6049131344. The cubic root of 3521646 is about 152.1418055680.

Adding to 3521646 its reverse (6461253), we get a palindrome (9982899).

The spelling of 3521646 in words is "three million, five hundred twenty-one thousand, six hundred forty-six".