3541621 has 4 divisors (see below), whose sum is σ = 3628044. Its totient is φ = 3455200.

The previous prime is 3541613. The next prime is 3541631. The reversal of 3541621 is 1261453.

3541621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1261453 = 53 ⋅23801.

It can be written as a sum of positive squares in 2 ways, for example, as 688900 + 2852721 = 830^2 + 1689^2 .

It is a cyclic number.

It is not a de Polignac number, because 3541621 - 2³ = 3541613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3541592 and 3541601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3541631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43150 + ... + 43231.

It is an arithmetic number, because the mean of its divisors is an integer number (907011).

Almost surely, 2^3541621 is an apocalyptic number.

It is an amenable number.

3541621 is a deficient number, since it is larger than the sum of its proper divisors (86423).

3541621 is an equidigital number, since it uses as much as digits as its factorization.

3541621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86422.

The product of its digits is 720, while the sum is 22.

The square root of 3541621 is about 1881.9194988097. The cubic root of 3541621 is about 152.4289160784.

The spelling of 3541621 in words is "three million, five hundred forty-one thousand, six hundred twenty-one".