1283209 has 4 divisors (see below), whose sum is σ = 1285504. Its totient is φ = 1280916.

The previous prime is 1283207. The next prime is 1283237. The reversal of 1283209 is 9023821.

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 1283209 - 2¹ = 1283207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1283207) 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, 304 + ... + 1630.

It is an arithmetic number, because the mean of its divisors is an integer number (321376).

2^1283209 is an apocalyptic number.

It is an amenable number.

1283209 is a deficient number, since it is larger than the sum of its proper divisors (2295).

1283209 is an equidigital number, since it uses as much as digits as its factorization.

1283209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1283209 is about 1132.7881531866. The cubic root of 1283209 is about 108.6673640079.

The spelling of 1283209 in words is "one million, two hundred eighty-three thousand, two hundred nine".