3545221 has 8 divisors (see below), whose sum is σ = 3754080. Its totient is φ = 3342192.

The previous prime is 3545219. The next prime is 3545237. The reversal of 3545221 is 1225453.

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

It is not a de Polignac number, because 3545221 - 2¹ = 3545219 is a prime.

It is a Duffinian number.

3545221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3545192 and 3545201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3545261) 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, 175 + ... + 2668.

It is an arithmetic number, because the mean of its divisors is an integer number (469260).

Almost surely, 2^3545221 is an apocalyptic number.

It is an amenable number.

3545221 is a deficient number, since it is larger than the sum of its proper divisors (208859).

3545221 is a wasteful number, since it uses less digits than its factorization.

3545221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2915.

The product of its digits is 1200, while the sum is 22.

The square root of 3545221 is about 1882.8757261168. The cubic root of 3545221 is about 152.4805457581.

The spelling of 3545221 in words is "three million, five hundred forty-five thousand, two hundred twenty-one".