1285480 has 32 divisors (see below), whose sum is σ = 3306240. Its totient is φ = 440640.

The previous prime is 1285469. The next prime is 1285481. The reversal of 1285480 is 845821.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1285481) 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, 2016 + ... + 2575.

It is an arithmetic number, because the mean of its divisors is an integer number (103320).

2^1285480 is an apocalyptic number.

1285480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285480 is an abundant number, since it is smaller than the sum of its proper divisors (2020760).

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

1285480 is a wasteful number, since it uses less digits than its factorization.

1285480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4609 (or 4605 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 1285480 is about 1133.7901040316. The cubic root of 1285480 is about 108.7314320701.

The spelling of 1285480 in words is "one million, two hundred eighty-five thousand, four hundred eighty".