1280424 has 32 divisors (see below), whose sum is σ = 3306240. Its totient is φ = 412800.

The previous prime is 1280417. The next prime is 1280431. The reversal of 1280424 is 4240821.

It is an interprime number because it is at equal distance from previous prime (1280417) and next prime (1280431).

It is a self number, because there is not a number n which added to its sum of digits gives 1280424.

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, 117 + ... + 1604.

It is an arithmetic number, because the mean of its divisors is an integer number (103320).

2^1280424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1653120).

1280424 is an abundant number, since it is smaller than the sum of its proper divisors (2025816).

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

1280424 is a wasteful number, since it uses less digits than its factorization.

1280424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761 (or 1757 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1280424 is about 1131.5582176804. The cubic root of 1280424 is about 108.5886920181.

The spelling of 1280424 in words is "one million, two hundred eighty thousand, four hundred twenty-four".