1421804 has 12 divisors (see below), whose sum is σ = 2502528. Its totient is φ = 706800.

The previous prime is 1421801. The next prime is 1421813. The reversal of 1421804 is 4081241.

It is a super-2 number, since 2×1421804² = 4043053228832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1421801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167 + ... + 1694.

It is an arithmetic number, because the mean of its divisors is an integer number (208544).

2^1421804 is an apocalyptic number.

It is an amenable number.

1421804 is a deficient number, since it is larger than the sum of its proper divisors (1080724).

1421804 is a wasteful number, since it uses less digits than its factorization.

1421804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056 (or 2054 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1421804 is about 1192.3942301102. The cubic root of 1421804 is about 112.4466644299.

The spelling of 1421804 in words is "one million, four hundred twenty-one thousand, eight hundred four".