3670221 has 8 divisors (see below), whose sum is σ = 4960960. Its totient is φ = 2413152.

The previous prime is 3670171. The next prime is 3670231. The reversal of 3670221 is 1220763.

It is a happy number.

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

It is not a de Polignac number, because 3670221 - 2⁹ = 3669709 is a prime.

It is a Duffinian number.

3670221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3670231) 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, 8161 + ... + 8598.

It is an arithmetic number, because the mean of its divisors is an integer number (620120).

Almost surely, 2^3670221 is an apocalyptic number.

It is an amenable number.

3670221 is a deficient number, since it is larger than the sum of its proper divisors (1290739).

3670221 is a wasteful number, since it uses less digits than its factorization.

3670221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16835.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 3670221 is about 1915.7820857290. The cubic root of 3670221 is about 154.2519768727.

Adding to 3670221 its reverse (1220763), we get a palindrome (4890984).

The spelling of 3670221 in words is "three million, six hundred seventy thousand, two hundred twenty-one".