1800542 has 16 divisors (see below), whose sum is σ = 2823552. Its totient is φ = 860160.

The previous prime is 1800541. The next prime is 1800551. The reversal of 1800542 is 2450081.

1800542 is a modest number, since divided by 542 gives 18 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6878 + ... + 7134.

It is an arithmetic number, because the mean of its divisors is an integer number (176472).

2^1800542 is an apocalyptic number.

1800542 is a deficient number, since it is larger than the sum of its proper divisors (1023010).

1800542 is a wasteful number, since it uses less digits than its factorization.

1800542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1800542 is about 1341.8427627707. The cubic root of 1800542 is about 121.6562481435.

The spelling of 1800542 in words is "one million, eight hundred thousand, five hundred forty-two".