1802423 has 4 divisors (see below), whose sum is σ = 2059920. Its totient is φ = 1544928.

The previous prime is 1802419. The next prime is 1802491. The reversal of 1802423 is 3242081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3242081 = 79 ⋅41039.

It is not a de Polignac number, because 1802423 - 2² = 1802419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1802395 and 1802404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1802923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128738 + ... + 128751.

It is an arithmetic number, because the mean of its divisors is an integer number (514980).

2^1802423 is an apocalyptic number.

1802423 is a deficient number, since it is larger than the sum of its proper divisors (257497).

1802423 is an equidigital number, since it uses as much as digits as its factorization.

1802423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257496.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1802423 is about 1342.5434816050. The cubic root of 1802423 is about 121.6985975698.

The spelling of 1802423 in words is "one million, eight hundred two thousand, four hundred twenty-three".