1622216 has 8 divisors (see below), whose sum is σ = 3041670. Its totient is φ = 811104.

The previous prime is 1622209. The next prime is 1622233. The reversal of 1622216 is 6122261.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1416100 + 206116 = 1190^2 + 454^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101381 + ... + 101396.

2^1622216 is an apocalyptic number.

It is an amenable number.

1622216 is a deficient number, since it is larger than the sum of its proper divisors (1419454).

1622216 is a wasteful number, since it uses less digits than its factorization.

1622216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202783 (or 202779 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 1622216 is about 1273.6624356555. The cubic root of 1622216 is about 117.4995563587.

Adding to 1622216 its reverse (6122261), we get a palindrome (7744477).

The spelling of 1622216 in words is "one million, six hundred twenty-two thousand, two hundred sixteen".