1643442 has 16 divisors (see below), whose sum is σ = 3430080. Its totient is φ = 523952.

The previous prime is 1643431. The next prime is 1643461. The reversal of 1643442 is 2443461.

It is a d-powerful number, because it can be written as 1 + 6³ + 4⁶ + 3⁶ + 4⁸ + 4¹⁰ + 2¹⁹ .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5817 + ... + 6092.

It is an arithmetic number, because the mean of its divisors is an integer number (214380).

2^1643442 is an apocalyptic number.

1643442 is an abundant number, since it is smaller than the sum of its proper divisors (1786638).

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

1643442 is a wasteful number, since it uses less digits than its factorization.

1643442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11937.

The product of its digits is 2304, while the sum is 24.

The square root of 1643442 is about 1281.9680183218. The cubic root of 1643442 is about 118.0098143709.

The spelling of 1643442 in words is "one million, six hundred forty-three thousand, four hundred forty-two".