1279289 has 8 divisors (see below), whose sum is σ = 1469280. Its totient is φ = 1101600.

The previous prime is 1279253. The next prime is 1279303. The reversal of 1279289 is 9829721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1279289 - 2¹² = 1275193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1279249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2852 + ... + 3269.

It is an arithmetic number, because the mean of its divisors is an integer number (183660).

2^1279289 is an apocalyptic number.

1279289 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1279289 is a deficient number, since it is larger than the sum of its proper divisors (189991).

1279289 is a wasteful number, since it uses less digits than its factorization.

1279289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6151.

The product of its digits is 18144, while the sum is 38.

The square root of 1279289 is about 1131.0565856755. The cubic root of 1279289 is about 108.5565972849.

The spelling of 1279289 in words is "one million, two hundred seventy-nine thousand, two hundred eighty-nine".