1401804 has 36 divisors (see below), whose sum is σ = 3699696. Its totient is φ = 446688.

The previous prime is 1401793. The next prime is 1401809. The reversal of 1401804 is 4081041.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1401809) 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 11 ways as a sum of consecutive naturals, for example, 19 + ... + 1674.

2^1401804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1849848).

1401804 is an abundant number, since it is smaller than the sum of its proper divisors (2297892).

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

1401804 is a wasteful number, since it uses less digits than its factorization.

1401804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726 (or 1721 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1401804 is about 1183.9780403369. The cubic root of 1401804 is about 111.9169239377.

Adding to 1401804 its reverse (4081041), we get a palindrome (5482845).

The spelling of 1401804 in words is "one million, four hundred one thousand, eight hundred four".