1263280 has 20 divisors (see below), whose sum is σ = 2937312. Its totient is φ = 505280.

The previous prime is 1263263. The next prime is 1263299. The reversal of 1263280 is 823621.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7816 + ... + 7975.

2^1263280 is an apocalyptic number.

1263280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263280 is an abundant number, since it is smaller than the sum of its proper divisors (1674032).

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

1263280 is a wasteful number, since it uses less digits than its factorization.

1263280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15804 (or 15798 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1263280 is about 1123.9572945624. The cubic root of 1263280 is about 108.1018700455.

The spelling of 1263280 in words is "one million, two hundred sixty-three thousand, two hundred eighty".