3541821 has 12 divisors (see below), whose sum is σ = 4812192. Its totient is φ = 2317128.

The previous prime is 3541817. The next prime is 3541823. The reversal of 3541821 is 1281453.

3541821 = T₁₄ + T₁₅ + ... + T₂₇₆.

It is not a de Polignac number, because 3541821 - 2² = 3541817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3541791 and 3541800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3541823) 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, 13336 + ... + 13598.

It is an arithmetic number, because the mean of its divisors is an integer number (401016).

Almost surely, 2^3541821 is an apocalyptic number.

It is an amenable number.

3541821 is a deficient number, since it is larger than the sum of its proper divisors (1270371).

3541821 is an equidigital number, since it uses as much as digits as its factorization.

3541821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 333 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 3541821 is about 1881.9726352952. The cubic root of 3541821 is about 152.4317853116.

The spelling of 3541821 in words is "three million, five hundred forty-one thousand, eight hundred twenty-one".