3775221 has 16 divisors (see below), whose sum is σ = 5745600. Its totient is φ = 2448144.

The previous prime is 3775201. The next prime is 3775297. The reversal of 3775221 is 1225773.

It is not a de Polignac number, because 3775221 - 2⁹ = 3774709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3775201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 891 + ... + 2888.

It is an arithmetic number, because the mean of its divisors is an integer number (359100).

Almost surely, 2^3775221 is an apocalyptic number.

It is an amenable number.

3775221 is a deficient number, since it is larger than the sum of its proper divisors (1970379).

3775221 is a wasteful number, since it uses less digits than its factorization.

3775221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3825 (or 3819 counting only the distinct ones).

The product of its digits is 2940, while the sum is 27.

The square root of 3775221 is about 1942.9927946341. The cubic root of 3775221 is about 155.7091474090.

It can be divided in two parts, 37752 and 21, that added together give a palindrome (37773).

The spelling of 3775221 in words is "three million, seven hundred seventy-five thousand, two hundred twenty-one".