3712221 has 12 divisors (see below), whose sum is σ = 5453760. Its totient is φ = 2432520.

The previous prime is 3712207. The next prime is 3712231. The reversal of 3712221 is 1222173.

It is not a de Polignac number, because 3712221 - 2⁹ = 3711709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3712194 and 3712203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3712231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2965 + ... + 4026.

It is an arithmetic number, because the mean of its divisors is an integer number (454480).

Almost surely, 2^3712221 is an apocalyptic number.

It is an amenable number.

3712221 is a deficient number, since it is larger than the sum of its proper divisors (1741539).

3712221 is a wasteful number, since it uses less digits than its factorization.

3712221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7056 (or 7053 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 3712221 is about 1926.7124850377. The cubic root of 3712221 is about 154.8381383505.

Adding to 3712221 its reverse (1222173), we get a palindrome (4934394).

The spelling of 3712221 in words is "three million, seven hundred twelve thousand, two hundred twenty-one".