3533521 has 4 divisors (see below), whose sum is σ = 3561472. Its totient is φ = 3505572.

The previous prime is 3533489. The next prime is 3533531. The reversal of 3533521 is 1253353.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1253353 = 379 ⋅3307.

It is a cyclic number.

It is not a de Polignac number, because 3533521 - 2⁵ = 3533489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3533492 and 3533501.

It is not an unprimeable number, because it can be changed into a prime (3533531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13785 + ... + 14038.

It is an arithmetic number, because the mean of its divisors is an integer number (890368).

Almost surely, 2^3533521 is an apocalyptic number.

It is an amenable number.

3533521 is a deficient number, since it is larger than the sum of its proper divisors (27951).

3533521 is a wasteful number, since it uses less digits than its factorization.

3533521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27950.

The product of its digits is 1350, while the sum is 22.

The square root of 3533521 is about 1879.7662088675. The cubic root of 3533521 is about 152.3126212436.

Adding to 3533521 its reverse (1253353), we get a palindrome (4786874).

It can be divided in two parts, 353352 and 1, that added together give a palindrome (353353).

The spelling of 3533521 in words is "three million, five hundred thirty-three thousand, five hundred twenty-one".