3721229 has 2 divisors, whose sum is σ = 3721230. Its totient is φ = 3721228.

The previous prime is 3721217. The next prime is 3721259. The reversal of 3721229 is 9221273.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1965604 + 1755625 = 1402^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 3721229 - 2⁴ = 3721213 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3721198 and 3721207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3721259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1860614 + 1860615.

It is an arithmetic number, because the mean of its divisors is an integer number (1860615).

Almost surely, 2^3721229 is an apocalyptic number.

It is an amenable number.

3721229 is a deficient number, since it is larger than the sum of its proper divisors (1).

3721229 is an equidigital number, since it uses as much as digits as its factorization.

3721229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 26.

The square root of 3721229 is about 1929.0487292964. The cubic root of 3721229 is about 154.9632795428.

The spelling of 3721229 in words is "three million, seven hundred twenty-one thousand, two hundred twenty-nine".