1280500 has 48 divisors (see below), whose sum is σ = 3027024. Its totient is φ = 470400.

The previous prime is 1280473. The next prime is 1280519. The reversal of 1280500 is 50821.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 272484 + 1008016 = 522^2 + 1004^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6402 + ... + 6598.

It is an arithmetic number, because the mean of its divisors is an integer number (63063).

2^1280500 is an apocalyptic number.

1280500 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 1280500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1513512).

1280500 is an abundant number, since it is smaller than the sum of its proper divisors (1746524).

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

1280500 is a wasteful number, since it uses less digits than its factorization.

1280500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1280500 is about 1131.5917991926. The cubic root of 1280500 is about 108.5908404151.

It can be divided in two parts, 1280 and 500, that multiplied together give a square (640000 = 800²).

The spelling of 1280500 in words is "one million, two hundred eighty thousand, five hundred".