3071221 has 4 divisors (see below), whose sum is σ = 3100032. Its totient is φ = 3042412.

The previous prime is 3071219. The next prime is 3071231. The reversal of 3071221 is 1221703.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 3071221 - 2¹ = 3071219 is a prime.

It is a Duffinian number.

3071221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3071195 and 3071204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3071231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14245 + ... + 14458.

It is an arithmetic number, because the mean of its divisors is an integer number (775008).

Almost surely, 2^3071221 is an apocalyptic number.

It is an amenable number.

3071221 is a deficient number, since it is larger than the sum of its proper divisors (28811).

3071221 is a wasteful number, since it uses less digits than its factorization.

3071221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28810.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 3071221 is about 1752.4899429098. The cubic root of 3071221 is about 145.3573587407.

Adding to 3071221 its reverse (1221703), we get a palindrome (4292924).

The spelling of 3071221 in words is "three million, seventy-one thousand, two hundred twenty-one".