3139221 has 8 divisors (see below), whose sum is σ = 4330080. Its totient is φ = 2020592.

The previous prime is 3139207. The next prime is 3139231. The reversal of 3139221 is 1229313.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3139221 - 2⁵ = 3139189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3139231) 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, 17955 + ... + 18128.

It is an arithmetic number, because the mean of its divisors is an integer number (541260).

Almost surely, 2^3139221 is an apocalyptic number.

It is an amenable number.

3139221 is a deficient number, since it is larger than the sum of its proper divisors (1190859).

3139221 is a wasteful number, since it uses less digits than its factorization.

3139221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36115.

The product of its digits is 324, while the sum is 21.

The square root of 3139221 is about 1771.7846934659. The cubic root of 3139221 is about 146.4223244495.

It can be divided in two parts, 31392 and 21, that added together give a palindrome (31413).

The spelling of 3139221 in words is "three million, one hundred thirty-nine thousand, two hundred twenty-one".