3523421 has 16 divisors (see below), whose sum is σ = 4017600. Its totient is φ = 3062400.

The previous prime is 3523397. The next prime is 3523427. The reversal of 3523421 is 1243253.

It is a happy number.

It is not a de Polignac number, because 3523421 - 2⁶ = 3523357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3523393 and 3523402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3523427) 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 15 ways as a sum of consecutive naturals, for example, 39545 + ... + 39633.

It is an arithmetic number, because the mean of its divisors is an integer number (251100).

Almost surely, 2^3523421 is an apocalyptic number.

It is an amenable number.

3523421 is a deficient number, since it is larger than the sum of its proper divisors (494179).

3523421 is a wasteful number, since it uses less digits than its factorization.

3523421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220.

The product of its digits is 720, while the sum is 20.

The square root of 3523421 is about 1877.0777820858. The cubic root of 3523421 is about 152.1673624001.

Adding to 3523421 its reverse (1243253), we get a palindrome (4766674).

It can be divided in two parts, 352 and 3421, that added together give a palindrome (3773).

The spelling of 3523421 in words is "three million, five hundred twenty-three thousand, four hundred twenty-one".