1421800 has 24 divisors (see below), whose sum is σ = 3306150. Its totient is φ = 568640.

The previous prime is 1421779. The next prime is 1421801. The reversal of 1421800 is 81241.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 784996 + 636804 = 886^2 + 798^2 .

It is not an unprimeable number, because it can be changed into a prime (1421801) 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 5 ways as a sum of consecutive naturals, for example, 3355 + ... + 3754.

2^1421800 is an apocalyptic number.

1421800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421800 is an abundant number, since it is smaller than the sum of its proper divisors (1884350).

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

1421800 is a wasteful number, since it uses less digits than its factorization.

1421800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7125 (or 7116 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1421800 is about 1192.3925528114. The cubic root of 1421800 is about 112.4465589800.

The spelling of 1421800 in words is "one million, four hundred twenty-one thousand, eight hundred".