1620622 has 8 divisors (see below), whose sum is σ = 2453976. Its totient is φ = 802632.

The previous prime is 1620617. The next prime is 1620629. The reversal of 1620622 is 2260261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1620622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620629) 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 3 ways as a sum of consecutive naturals, for example, 3573 + ... + 4000.

It is an arithmetic number, because the mean of its divisors is an integer number (306747).

2^1620622 is an apocalyptic number.

1620622 is a deficient number, since it is larger than the sum of its proper divisors (833354).

1620622 is a wasteful number, since it uses less digits than its factorization.

1620622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7682.

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

The square root of 1620622 is about 1273.0365273628. The cubic root of 1620622 is about 117.4610584702.

Adding to 1620622 its reverse (2260261), we get a palindrome (3880883).

The spelling of 1620622 in words is "one million, six hundred twenty thousand, six hundred twenty-two".