1609243 has 4 divisors (see below), whose sum is σ = 1693960. Its totient is φ = 1524528.

The previous prime is 1609219. The next prime is 1609247. The reversal of 1609243 is 3429061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3429061 = 233 ⋅14717.

It is a cyclic number.

It is not a de Polignac number, because 1609243 - 2⁵ = 1609211 is a prime.

It is a Duffinian number.

1609243 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1609247) 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, 42330 + ... + 42367.

It is an arithmetic number, because the mean of its divisors is an integer number (423490).

2^1609243 is an apocalyptic number.

1609243 is a deficient number, since it is larger than the sum of its proper divisors (84717).

1609243 is an equidigital number, since it uses as much as digits as its factorization.

1609243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84716.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1609243 is about 1268.5594191838. The cubic root of 1609243 is about 117.1854996873.

The spelling of 1609243 in words is "one million, six hundred nine thousand, two hundred forty-three".