1209280 has 28 divisors (see below), whose sum is σ = 2880360. Its totient is φ = 483584.

The previous prime is 1209277. The next prime is 1209281. The reversal of 1209280 is 829021.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1570 + ... + 2209.

It is an arithmetic number, because the mean of its divisors is an integer number (102870).

2^1209280 is an apocalyptic number.

1209280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1209280 is an abundant number, since it is smaller than the sum of its proper divisors (1671080).

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

1209280 is an equidigital number, since it uses as much as digits as its factorization.

1209280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3796 (or 3786 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1209280 is about 1099.6726785730. The cubic root of 1209280 is about 106.5390835709.

The spelling of 1209280 in words is "one million, two hundred nine thousand, two hundred eighty".