1279406 has 4 divisors (see below), whose sum is σ = 1919112. Its totient is φ = 639702.

The previous prime is 1279361. The next prime is 1279417. The reversal of 1279406 is 6049721.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 319850 + ... + 319853.

It is an arithmetic number, because the mean of its divisors is an integer number (479778).

2^1279406 is an apocalyptic number.

1279406 is a deficient number, since it is larger than the sum of its proper divisors (639706).

1279406 is an equidigital number, since it uses as much as digits as its factorization.

1279406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639705.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1279406 is about 1131.1083060432. The cubic root of 1279406 is about 108.5599066061.

The spelling of 1279406 in words is "one million, two hundred seventy-nine thousand, four hundred six".