1280980 has 24 divisors (see below), whose sum is σ = 2832480. Its totient is φ = 485280.

The previous prime is 1280969. The next prime is 1280987. The reversal of 1280980 is 890821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280987) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1306 + ... + 2065.

It is an arithmetic number, because the mean of its divisors is an integer number (118020).

2^1280980 is an apocalyptic number.

1280980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280980 is an abundant number, since it is smaller than the sum of its proper divisors (1551500).

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

1280980 is a wasteful number, since it uses less digits than its factorization.

1280980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399 (or 3397 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1280980 is about 1131.8038699351. The cubic root of 1280980 is about 108.6044072749.

It can be divided in two parts, 1280 and 980, that multiplied together give a square (1254400 = 1120²).

The spelling of 1280980 in words is "one million, two hundred eighty thousand, nine hundred eighty".