621622 has 16 divisors (see below), whose sum is σ = 1010880. Its totient is φ = 285568.

The previous prime is 621619. The next prime is 621629. The reversal of 621622 is 226126.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 621622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621629) 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 7 ways as a sum of consecutive naturals, for example, 1404 + ... + 1792.

It is an arithmetic number, because the mean of its divisors is an integer number (63180).

2⁶²¹⁶²² is an apocalyptic number.

621622 is a deficient number, since it is larger than the sum of its proper divisors (389258).

621622 is a wasteful number, since it uses less digits than its factorization.

621622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455.

The product of its digits is 288, while the sum is 19.

The square root of 621622 is about 788.4300856766. The cubic root of 621622 is about 85.3444843555.

Adding to 621622 its reverse (226126), we get a palindrome (847748).

The spelling of 621622 in words is "six hundred twenty-one thousand, six hundred twenty-two".