1279965 has 8 divisors (see below), whose sum is σ = 2047968. Its totient is φ = 682640.

The previous prime is 1279961. The next prime is 1279969. The reversal of 1279965 is 5699721.

It is an interprime number because it is at equal distance from previous prime (1279961) and next prime (1279969).

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

It is not a de Polignac number, because 1279965 - 2² = 1279961 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42651 + ... + 42680.

It is an arithmetic number, because the mean of its divisors is an integer number (255996).

2^1279965 is an apocalyptic number.

1279965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1279965 is a deficient number, since it is larger than the sum of its proper divisors (768003).

1279965 is an equidigital number, since it uses as much as digits as its factorization.

1279965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85339.

The product of its digits is 34020, while the sum is 39.

The square root of 1279965 is about 1131.3553818319. The cubic root of 1279965 is about 108.5757150234.

The spelling of 1279965 in words is "one million, two hundred seventy-nine thousand, nine hundred sixty-five".