1279655 has 8 divisors (see below), whose sum is σ = 1653792. Its totient is φ = 944928.

The previous prime is 1279643. The next prime is 1279657. The reversal of 1279655 is 5569721.

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 1279655 - 2¹⁰ = 1278631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279657) 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 7 ways as a sum of consecutive naturals, for example, 9779 + ... + 9908.

It is an arithmetic number, because the mean of its divisors is an integer number (206724).

2^1279655 is an apocalyptic number.

1279655 is a deficient number, since it is larger than the sum of its proper divisors (374137).

1279655 is a wasteful number, since it uses less digits than its factorization.

1279655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19705.

The product of its digits is 18900, while the sum is 35.

The square root of 1279655 is about 1131.2183697235. The cubic root of 1279655 is about 108.5669488489.

The spelling of 1279655 in words is "one million, two hundred seventy-nine thousand, six hundred fifty-five".