1279040 has 56 divisors (see below), whose sum is σ = 3486912. Its totient is φ = 437760.

The previous prime is 1279039. The next prime is 1279043. The reversal of 1279040 is 409721.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 1278997 and 1279015.

It is not an unprimeable number, because it can be changed into a prime (1279043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1955 + ... + 2525.

2^1279040 is an apocalyptic number.

1279040 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 1279040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1743456).

1279040 is an abundant number, since it is smaller than the sum of its proper divisors (2207872).

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

1279040 is an equidigital number, since it uses as much as digits as its factorization.

1279040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1279040 is about 1130.9465062504. The cubic root of 1279040 is about 108.5495536988.

The spelling of 1279040 in words is "one million, two hundred seventy-nine thousand, forty".