1800426 has 16 divisors (see below), whose sum is σ = 3637728. Its totient is φ = 594000.

The previous prime is 1800413. The next prime is 1800431. The reversal of 1800426 is 6240081.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 880 + ... + 2091.

It is an arithmetic number, because the mean of its divisors is an integer number (227358).

2^1800426 is an apocalyptic number.

1800426 is an abundant number, since it is smaller than the sum of its proper divisors (1837302).

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

1800426 is a wasteful number, since it uses less digits than its factorization.

1800426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1800426 is about 1341.7995379340. The cubic root of 1800426 is about 121.6536355177.

The spelling of 1800426 in words is "one million, eight hundred thousand, four hundred twenty-six".