3523021 has 4 divisors (see below), whose sum is σ = 3528700. Its totient is φ = 3517344.

The previous prime is 3523019. The next prime is 3523027. The reversal of 3523021 is 1203253.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1203253 = 67 ⋅17959.

It can be written as a sum of positive squares in 2 ways, for example, as 585225 + 2937796 = 765^2 + 1714^2 .

It is a cyclic number.

It is not a de Polignac number, because 3523021 - 2¹ = 3523019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3522986 and 3523004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3523027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776 + ... + 3193.

It is an arithmetic number, because the mean of its divisors is an integer number (882175).

Almost surely, 2^3523021 is an apocalyptic number.

It is an amenable number.

3523021 is a deficient number, since it is larger than the sum of its proper divisors (5679).

3523021 is an equidigital number, since it uses as much as digits as its factorization.

3523021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5678.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 3523021 is about 1876.9712304668. The cubic root of 3523021 is about 152.1616038633.

Adding to 3523021 its reverse (1203253), we get a palindrome (4726274).

The spelling of 3523021 in words is "three million, five hundred twenty-three thousand, twenty-one".