1279870 has 16 divisors (see below), whose sum is σ = 2323728. Its totient is φ = 507520.

The previous prime is 1279853. The next prime is 1279871. The reversal of 1279870 is 789721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279871) 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, 822 + ... + 1798.

It is an arithmetic number, because the mean of its divisors is an integer number (145233).

2^1279870 is an apocalyptic number.

1279870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1279870 is a deficient number, since it is larger than the sum of its proper divisors (1043858).

1279870 is a wasteful number, since it uses less digits than its factorization.

1279870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 1279870 is about 1131.3133960137. The cubic root of 1279870 is about 108.5730287655.

The spelling of 1279870 in words is "one million, two hundred seventy-nine thousand, eight hundred seventy".