1279760 has 40 divisors (see below), whose sum is σ = 3153816. Its totient is φ = 481280.

The previous prime is 1279757. The next prime is 1279787. The reversal of 1279760 is 679721.

It can be written as a sum of positive squares in 4 ways, for example, as 327184 + 952576 = 572^2 + 976^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890 + ... + 1830.

2^1279760 is an apocalyptic number.

1279760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1279760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1576908).

1279760 is an abundant number, since it is smaller than the sum of its proper divisors (1874056).

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

1279760 is a wasteful number, since it uses less digits than its factorization.

1279760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971 (or 965 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 1279760 is about 1131.2647789090. The cubic root of 1279760 is about 108.5699181956.

The spelling of 1279760 in words is "one million, two hundred seventy-nine thousand, seven hundred sixty".