1620922 has 8 divisors (see below), whose sum is σ = 2462400. Its totient is φ = 800124.

The previous prime is 1620917. The next prime is 1620923. The reversal of 1620922 is 2290261.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1620893 and 1620902.

It is not an unprimeable number, because it can be changed into a prime (1620923) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4972 + ... + 5287.

It is an arithmetic number, because the mean of its divisors is an integer number (307800).

2^1620922 is an apocalyptic number.

1620922 is a deficient number, since it is larger than the sum of its proper divisors (841478).

1620922 is a wasteful number, since it uses less digits than its factorization.

1620922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10340.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1620922 is about 1273.1543504226. The cubic root of 1620922 is about 117.4683059228.

Subtracting from 1620922 its sum of digits (22), we obtain a triangular number (1620900 = T₁₈₀₀).

The spelling of 1620922 in words is "one million, six hundred twenty thousand, nine hundred twenty-two".