3423521 has 4 divisors (see below), whose sum is σ = 3428352. Its totient is φ = 3418692.

The previous prime is 3423517. The next prime is 3423523. The reversal of 3423521 is 1253243.

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: 1253243 = 251 ⋅4993.

It is a cyclic number.

It is not a de Polignac number, because 3423521 - 2² = 3423517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3423493 and 3423502.

It is not an unprimeable number, because it can be changed into a prime (3423523) 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, 1121 + ... + 2846.

It is an arithmetic number, because the mean of its divisors is an integer number (857088).

Almost surely, 2^3423521 is an apocalyptic number.

It is an amenable number.

3423521 is a deficient number, since it is larger than the sum of its proper divisors (4831).

3423521 is an equidigital number, since it uses as much as digits as its factorization.

3423521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830.

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

The square root of 3423521 is about 1850.2759253690. The cubic root of 3423521 is about 150.7154121085.

Adding to 3423521 its reverse (1253243), we get a palindrome (4676764).

The spelling of 3423521 in words is "three million, four hundred twenty-three thousand, five hundred twenty-one".