1280032 has 48 divisors (see below), whose sum is σ = 2889432. Its totient is φ = 552960.

The previous prime is 1280023. The next prime is 1280101. The reversal of 1280032 is 2300821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 646416 + 633616 = 804^2 + 796^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1279988 and 1280015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6982 + ... + 7162.

2^1280032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1444716).

1280032 is an abundant number, since it is smaller than the sum of its proper divisors (1609400).

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

1280032 is a wasteful number, since it uses less digits than its factorization.

1280032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1280032 is about 1131.3849919457. The cubic root of 1280032 is about 108.5776094621.

Adding to 1280032 its reverse (2300821), we get a palindrome (3580853).

It can be divided in two parts, 12800 and 32, that multiplied together give a square (409600 = 640²).

The spelling of 1280032 in words is "one million, two hundred eighty thousand, thirty-two".