1285120 has 44 divisors (see below), whose sum is σ = 3095064. Its totient is φ = 512000.

The previous prime is 1285117. The next prime is 1285129. The reversal of 1285120 is 215821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4995 + ... + 5245.

2^1285120 is an apocalyptic number.

1285120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1547532).

1285120 is an abundant number, since it is smaller than the sum of its proper divisors (1809944).

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

1285120 is an equidigital number, since it uses as much as digits as its factorization.

1285120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1285120 is about 1133.6313333708. The cubic root of 1285120 is about 108.7212810059.

The spelling of 1285120 in words is "one million, two hundred eighty-five thousand, one hundred twenty".