1282720 has 24 divisors (see below), whose sum is σ = 3030804. Its totient is φ = 513024.

The previous prime is 1282717. The next prime is 1282739. The reversal of 1282720 is 272821.

It can be written as a sum of positive squares in 2 ways, for example, as 1281424 + 1296 = 1132^2 + 36^2 .

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1282691 and 1282700.

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, 3849 + ... + 4168.

2^1282720 is an apocalyptic number.

1282720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1282720 is an abundant number, since it is smaller than the sum of its proper divisors (1748084).

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

1282720 is an equidigital number, since it uses as much as digits as its factorization.

1282720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8032 (or 8024 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1282720 is about 1132.5722934983. The cubic root of 1282720 is about 108.6535587503.

It can be divided in two parts, 1282 and 720, that added together give a palindrome (2002).

The spelling of 1282720 in words is "one million, two hundred eighty-two thousand, seven hundred twenty".