1605222 has 24 divisors (see below), whose sum is σ = 3501576. Its totient is φ = 531456.

The previous prime is 1605217. The next prime is 1605257. The reversal of 1605222 is 2225061.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1605195 and 1605204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4453 + ... + 4799.

It is an arithmetic number, because the mean of its divisors is an integer number (145899).

2^1605222 is an apocalyptic number.

1605222 is an abundant number, since it is smaller than the sum of its proper divisors (1896354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1605222 is a wasteful number, since it uses less digits than its factorization.

1605222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1605222 is about 1266.9735593137. The cubic root of 1605222 is about 117.0878148539.

The spelling of 1605222 in words is "one million, six hundred five thousand, two hundred twenty-two".