3739221 has 6 divisors (see below), whose sum is σ = 5401110. Its totient is φ = 2492808.

The previous prime is 3739199. The next prime is 3739247. The reversal of 3739221 is 1229373.

3739221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2604996 + 1134225 = 1614^2 + 1065^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3739221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3739291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 207726 + ... + 207743.

It is an arithmetic number, because the mean of its divisors is an integer number (900185).

Almost surely, 2^3739221 is an apocalyptic number.

It is an amenable number.

3739221 is a deficient number, since it is larger than the sum of its proper divisors (1661889).

3739221 is a wasteful number, since it uses less digits than its factorization.

3739221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415475 (or 415472 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 3739221 is about 1933.7065444374. The cubic root of 3739221 is about 155.2126252926.

The spelling of 3739221 in words is "three million, seven hundred thirty-nine thousand, two hundred twenty-one".