1620422 has 8 divisors (see below), whose sum is σ = 2476656. Its totient is φ = 794872.

The previous prime is 1620413. The next prime is 1620431. The reversal of 1620422 is 2240261.

It is an interprime number because it is at equal distance from previous prime (1620413) and next prime (1620431).

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1620422.

It is a congruent number.

It is an unprimeable number.

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, 7538 + ... + 7749.

It is an arithmetic number, because the mean of its divisors is an integer number (309582).

2^1620422 is an apocalyptic number.

1620422 is a deficient number, since it is larger than the sum of its proper divisors (856234).

1620422 is a wasteful number, since it uses less digits than its factorization.

1620422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15342.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1620422 is about 1272.9579725977. The cubic root of 1620422 is about 117.4562263382.

Adding to 1620422 its reverse (2240261), we get a palindrome (3860683).

The spelling of 1620422 in words is "one million, six hundred twenty thousand, four hundred twenty-two".