1645422 has 8 divisors (see below), whose sum is σ = 3290856. Its totient is φ = 548472.

The previous prime is 1645421. The next prime is 1645429. The reversal of 1645422 is 2245461.

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

1645422 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1645392 and 1645401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137113 + ... + 137124.

It is an arithmetic number, because the mean of its divisors is an integer number (411357).

2^1645422 is an apocalyptic number.

1645422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1645422 is a wasteful number, since it uses less digits than its factorization.

1645422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274242.

The product of its digits is 1920, while the sum is 24.

The square root of 1645422 is about 1282.7400360167. The cubic root of 1645422 is about 118.0571876396.

The spelling of 1645422 in words is "one million, six hundred forty-five thousand, four hundred twenty-two".