1601800 has 24 divisors (see below), whose sum is σ = 3724650. Its totient is φ = 640640.

The previous prime is 1601797. The next prime is 1601813. The reversal of 1601800 is 81061.

It can be written as a sum of positive squares in 3 ways, for example, as 1285956 + 315844 = 1134^2 + 562^2 .

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3805 + ... + 4204.

2^1601800 is an apocalyptic number.

1601800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1601800 is an abundant number, since it is smaller than the sum of its proper divisors (2122850).

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

1601800 is a wasteful number, since it uses less digits than its factorization.

1601800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8025 (or 8016 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1601800 is about 1265.6223765405. The cubic root of 1601800 is about 117.0045533573.

Adding to 1601800 its reverse (81061), we get a palindrome (1682861).

It can be divided in two parts, 1601 and 800, that multiplied together give a triangular number (1280800 = T₁₆₀₀).

The spelling of 1601800 in words is "one million, six hundred one thousand, eight hundred".