3521556 has 36 divisors (see below), whose sum is σ = 9233952. Its totient is φ = 1173528.

The previous prime is 3521543. The next prime is 3521561. The reversal of 3521556 is 6551253.

3521556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×3521556² = 24802713322272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 840 + ... + 2783.

Almost surely, 2^3521556 is an apocalyptic number.

3521556 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3521556 is an abundant number, since it is smaller than the sum of its proper divisors (5712396).

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

3521556 is a wasteful number, since it uses less digits than its factorization.

3521556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642 (or 3628 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 3521556 is about 1876.5809335065. The cubic root of 3521556 is about 152.1405094999.

The spelling of 3521556 in words is "three million, five hundred twenty-one thousand, five hundred fifty-six".