3805521 has 8 divisors (see below), whose sum is σ = 5085024. Its totient is φ = 2531520.

The previous prime is 3805499. The next prime is 3805531. The reversal of 3805521 is 1255083.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3805521 - 2⁵ = 3805489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3805491 and 3805500.

It is not an unprimeable number, because it can be changed into a prime (3805531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681 + ... + 2841.

It is an arithmetic number, because the mean of its divisors is an integer number (635628).

Almost surely, 2^3805521 is an apocalyptic number.

It is an amenable number.

3805521 is a deficient number, since it is larger than the sum of its proper divisors (1279503).

3805521 is a wasteful number, since it uses less digits than its factorization.

3805521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 3805521 is about 1950.7744615921. The cubic root of 3805521 is about 156.1246127931.

The spelling of 3805521 in words is "three million, eight hundred five thousand, five hundred twenty-one".