3531021 has 16 divisors (see below), whose sum is σ = 5209344. Its totient is φ = 2113344.

The previous prime is 3531013. The next prime is 3531037. The reversal of 3531021 is 1201353.

It is a happy number.

3531021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3531021 - 2³ = 3531013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3531001) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 220 + ... + 2666.

It is an arithmetic number, because the mean of its divisors is an integer number (325584).

Almost surely, 2^3531021 is an apocalyptic number.

It is an amenable number.

3531021 is a deficient number, since it is larger than the sum of its proper divisors (1678323).

3531021 is a wasteful number, since it uses less digits than its factorization.

3531021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 3531021 is about 1879.1011148951. The cubic root of 3531021 is about 152.2766918886.

Adding to 3531021 its reverse (1201353), we get a palindrome (4732374).

The spelling of 3531021 in words is "three million, five hundred thirty-one thousand, twenty-one".