3221626 has 4 divisors (see below), whose sum is σ = 4832442. Its totient is φ = 1610812.

The previous prime is 3221599. The next prime is 3221629. The reversal of 3221626 is 6261223.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6261223 = 61 ⋅102643.

It can be written as a sum of positive squares in only one way, i.e., 2117025 + 1104601 = 1455^2 + 1051^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 3221597 and 3221606.

It is not an unprimeable number, because it can be changed into a prime (3221629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805405 + ... + 805408.

Almost surely, 2^3221626 is an apocalyptic number.

3221626 is a deficient number, since it is larger than the sum of its proper divisors (1610816).

3221626 is a wasteful number, since it uses less digits than its factorization.

3221626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610815.

The product of its digits is 864, while the sum is 22.

The square root of 3221626 is about 1794.8888544977. Note that the first 4 decimals coincide. The cubic root of 3221626 is about 147.6924768656.

Adding to 3221626 its reverse (6261223), we get a palindrome (9482849).

The spelling of 3221626 in words is "three million, two hundred twenty-one thousand, six hundred twenty-six".