1621222 has 16 divisors (see below), whose sum is σ = 2639952. Its totient is φ = 743680.

The previous prime is 1621219. The next prime is 1621231. The reversal of 1621222 is 2221261.

It is a junction number, because it is equal to n+sod(n) for n = 1621196 and 1621205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813 + ... + 1975.

It is an arithmetic number, because the mean of its divisors is an integer number (164997).

2^1621222 is an apocalyptic number.

1621222 is a deficient number, since it is larger than the sum of its proper divisors (1018730).

1621222 is a wasteful number, since it uses less digits than its factorization.

1621222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223.

The product of its digits is 96, while the sum is 16.

The square root of 1621222 is about 1273.2721625795. The cubic root of 1621222 is about 117.4755524812.

Adding to 1621222 its reverse (2221261), we get a palindrome (3842483).

The spelling of 1621222 in words is "one million, six hundred twenty-one thousand, two hundred twenty-two".