3530421 has 6 divisors (see below), whose sum is σ = 5099510. Its totient is φ = 2353608.

The previous prime is 3530413. The next prime is 3530453. The reversal of 3530421 is 1240353.

It can be written as a sum of positive squares in only one way, i.e., 3294225 + 236196 = 1815^2 + 486^2 .

It is not a de Polignac number, because 3530421 - 2³ = 3530413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3530394 and 3530403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3530221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 196126 + ... + 196143.

Almost surely, 2^3530421 is an apocalyptic number.

It is an amenable number.

3530421 is a deficient number, since it is larger than the sum of its proper divisors (1569089).

3530421 is a wasteful number, since it uses less digits than its factorization.

3530421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392275 (or 392272 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 3530421 is about 1878.9414573105. The cubic root of 3530421 is about 152.2680663201.

Adding to 3530421 its reverse (1240353), we get a palindrome (4770774).

The spelling of 3530421 in words is "three million, five hundred thirty thousand, four hundred twenty-one".