1404289 has 2 divisors, whose sum is σ = 1404290. Its totient is φ = 1404288.

The previous prime is 1404287. The next prime is 1404323. The reversal of 1404289 is 9824041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1404225 + 64 = 1185^2 + 8^2 .

It is a cyclic number.

It is not a de Polignac number, because 1404289 - 2¹ = 1404287 is a prime.

Together with 1404287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1404283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702144 + 702145.

It is an arithmetic number, because the mean of its divisors is an integer number (702145).

2^1404289 is an apocalyptic number.

It is an amenable number.

1404289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1404289 is an equidigital number, since it uses as much as digits as its factorization.

1404289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1404289 is about 1185.0270039117. The cubic root of 1404289 is about 111.9830171954.

The spelling of 1404289 in words is "one million, four hundred four thousand, two hundred eighty-nine".