1280550 has 24 divisors (see below), whose sum is σ = 3176136. Its totient is φ = 341440.

The previous prime is 1280549. The next prime is 1280561. The reversal of 1280550 is 550821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4119 + ... + 4418.

It is an arithmetic number, because the mean of its divisors is an integer number (132339).

2^1280550 is an apocalyptic number.

1280550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1280550 is an abundant number, since it is smaller than the sum of its proper divisors (1895586).

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

1280550 is a wasteful number, since it uses less digits than its factorization.

1280550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8552 (or 8547 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1280550 is about 1131.6138917493. The cubic root of 1280550 is about 108.5922537878.

It can be divided in two parts, 1280 and 550, that added together give a triangular number (1830 = T₆₀).

The spelling of 1280550 in words is "one million, two hundred eighty thousand, five hundred fifty".