1279923 has 4 divisors (see below), whose sum is σ = 1706568. Its totient is φ = 853280.

The previous prime is 1279921. The next prime is 1279931. The reversal of 1279923 is 3299721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1279923 - 2¹ = 1279921 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1279921) 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, 213318 + ... + 213323.

It is an arithmetic number, because the mean of its divisors is an integer number (426642).

2^1279923 is an apocalyptic number.

1279923 is a deficient number, since it is larger than the sum of its proper divisors (426645).

1279923 is an equidigital number, since it uses as much as digits as its factorization.

1279923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426644.

The product of its digits is 6804, while the sum is 33.

The square root of 1279923 is about 1131.3368198728. The cubic root of 1279923 is about 108.5745274310.

The spelling of 1279923 in words is "one million, two hundred seventy-nine thousand, nine hundred twenty-three".