1804427 has 4 divisors (see below), whose sum is σ = 1817736. Its totient is φ = 1791120.

The previous prime is 1804421. The next prime is 1804433. The reversal of 1804427 is 7244081.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1804421) and next prime (1804433).

It is a cyclic number.

It is not a de Polignac number, because 1804427 - 2¹⁸ = 1542283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1804396 and 1804405.

It is not an unprimeable number, because it can be changed into a prime (1804421) 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, 6449 + ... + 6722.

It is an arithmetic number, because the mean of its divisors is an integer number (454434).

2^1804427 is an apocalyptic number.

1804427 is a deficient number, since it is larger than the sum of its proper divisors (13309).

1804427 is a wasteful number, since it uses less digits than its factorization.

1804427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13308.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 1804427 is about 1343.2896188090. The cubic root of 1804427 is about 121.7436838525.

The spelling of 1804427 in words is "one million, eight hundred four thousand, four hundred twenty-seven".