1280832 has 56 divisors (see below), whose sum is σ = 3877056. Its totient is φ = 365568.

The previous prime is 1280821. The next prime is 1280833. The reversal of 1280832 is 2380821.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×1280832² = 3281061224448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 868 + ... + 1820.

2^1280832 is an apocalyptic number.

1280832 is a gapful number since it is divisible by the number (12) 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 1280832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1938528).

1280832 is an abundant number, since it is smaller than the sum of its proper divisors (2596224).

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

1280832 is an equidigital number, since it uses as much as digits as its factorization.

1280832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975 (or 965 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1280832 is about 1131.7384856936. The cubic root of 1280832 is about 108.6002245212.

It can be divided in two parts, 1280 and 832, that added together give a palindrome (2112).

The spelling of 1280832 in words is "one million, two hundred eighty thousand, eight hundred thirty-two".