3475821 has 4 divisors (see below), whose sum is σ = 4634432. Its totient is φ = 2317212.

The previous prime is 3475811. The next prime is 3475847. The reversal of 3475821 is 1285743.

3475821 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3475821 - 2⁶ = 3475757 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

3475821 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3475811) 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, 579301 + ... + 579306.

It is an arithmetic number, because the mean of its divisors is an integer number (1158608).

Almost surely, 2^3475821 is an apocalyptic number.

It is an amenable number.

3475821 is a deficient number, since it is larger than the sum of its proper divisors (1158611).

3475821 is a wasteful number, since it uses less digits than its factorization.

3475821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158610.

The product of its digits is 6720, while the sum is 30.

The square root of 3475821 is about 1864.3553845767. The cubic root of 3475821 is about 151.4790133114.

It can be divided in two parts, 34 and 75821, that added together give a triangular number (75855 = T₃₈₉).

The spelling of 3475821 in words is "three million, four hundred seventy-five thousand, eight hundred twenty-one".