1620200122 has 16 divisors (see below), whose sum is σ = 2447973000. Its totient is φ = 804218688.

The previous prime is 1620200119. The next prime is 1620200143. The reversal of 1620200122 is 2210020261.

It can be written as a sum of positive squares in 4 ways, for example, as 1023424081 + 596776041 = 31991^2 + 24429^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1620200096 and 1620200105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588004 + ... + 590752.

Almost surely, 2^1620200122 is an apocalyptic number.

1620200122 is a deficient number, since it is larger than the sum of its proper divisors (827772878).

1620200122 is a wasteful number, since it uses less digits than its factorization.

1620200122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4785.

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

The square root of 1620200122 is about 40251.7095537568. The cubic root of 1620200122 is about 1174.5086515410.

Adding to 1620200122 its reverse (2210020261), we get a palindrome (3830220383).

The spelling of 1620200122 in words is "one billion, six hundred twenty million, two hundred thousand, one hundred twenty-two".