1284409 has 4 divisors (see below), whose sum is σ = 1467904. Its totient is φ = 1100916.

The previous prime is 1284383. The next prime is 1284421. The reversal of 1284409 is 9044821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1284409 - 2⁹ = 1283897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1284209) 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 3 ways as a sum of consecutive naturals, for example, 91737 + ... + 91750.

It is an arithmetic number, because the mean of its divisors is an integer number (366976).

2^1284409 is an apocalyptic number.

It is an amenable number.

1284409 is a deficient number, since it is larger than the sum of its proper divisors (183495).

1284409 is an equidigital number, since it uses as much as digits as its factorization.

1284409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183494.

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

The square root of 1284409 is about 1133.3176959706. The cubic root of 1284409 is about 108.7012270833.

It can be divided in two parts, 128440 and 9, that multiplied together give a triangular number (1155960 = T₁₅₂₀).

The spelling of 1284409 in words is "one million, two hundred eighty-four thousand, four hundred nine".