3524021 has 4 divisors (see below), whose sum is σ = 3536844. Its totient is φ = 3511200.

The previous prime is 3523997. The next prime is 3524029. The reversal of 3524021 is 1204253.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1204253 = 173 ⋅6961.

It can be written as a sum of positive squares in 2 ways, for example, as 2739025 + 784996 = 1655^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 3524021 - 2⁶ = 3523957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3524029) 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, 5990 + ... + 6551.

It is an arithmetic number, because the mean of its divisors is an integer number (884211).

Almost surely, 2^3524021 is an apocalyptic number.

It is an amenable number.

3524021 is a deficient number, since it is larger than the sum of its proper divisors (12823).

3524021 is a wasteful number, since it uses less digits than its factorization.

3524021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12822.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 3524021 is about 1877.2375981745. The cubic root of 3524021 is about 152.1759993881.

Adding to 3524021 its reverse (1204253), we get a palindrome (4728274).

The spelling of 3524021 in words is "three million, five hundred twenty-four thousand, twenty-one".