1279788 has 12 divisors (see below), whose sum is σ = 2986200. Its totient is φ = 426592.

The previous prime is 1279787. The next prime is 1279801. The reversal of 1279788 is 8879721.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1279787) 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, 53313 + ... + 53336.

It is an arithmetic number, because the mean of its divisors is an integer number (248850).

2^1279788 is an apocalyptic number.

It is an amenable number.

1279788 is an abundant number, since it is smaller than the sum of its proper divisors (1706412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1279788 is a wasteful number, since it uses less digits than its factorization.

1279788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106656 (or 106654 counting only the distinct ones).

The product of its digits is 56448, while the sum is 42.

The square root of 1279788 is about 1131.2771543702. The cubic root of 1279788 is about 108.5707099939.

It can be divided in two parts, 12 and 79788, that added together give a triangular number (79800 = T₃₉₉).

The spelling of 1279788 in words is "one million, two hundred seventy-nine thousand, seven hundred eighty-eight".