3541221 has 12 divisors (see below), whose sum is σ = 5173740. Its totient is φ = 2333760.

The previous prime is 3541199. The next prime is 3541229. The reversal of 3541221 is 1221453.

It can be written as a sum of positive squares in 2 ways, for example, as 1822500 + 1718721 = 1350^2 + 1311^2 .

It is not a de Polignac number, because 3541221 - 2⁵ = 3541189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3541194 and 3541203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3541229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1410 + ... + 3011.

It is an arithmetic number, because the mean of its divisors is an integer number (431145).

Almost surely, 2^3541221 is an apocalyptic number.

It is an amenable number.

3541221 is a deficient number, since it is larger than the sum of its proper divisors (1632519).

3541221 is a wasteful number, since it uses less digits than its factorization.

3541221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4516 (or 4513 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 3541221 is about 1881.8132213373. The cubic root of 3541221 is about 152.4231772880.

Adding to 3541221 its reverse (1221453), we get a palindrome (4762674).

It can be divided in two parts, 354 and 1221, that multiplied together give a palindrome (432234).

The spelling of 3541221 in words is "three million, five hundred forty-one thousand, two hundred twenty-one".