1280533 has 8 divisors (see below), whose sum is σ = 1342008. Its totient is φ = 1220544.

The previous prime is 1280519. The next prime is 1280537. The reversal of 1280533 is 3350821.

1280533 is nontrivially palindromic in base 5.

It can be written as a sum of positive squares in 4 ways, for example, as 400689 + 879844 = 633^2 + 938^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1280533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280537) 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, 1635 + ... + 2287.

It is an arithmetic number, because the mean of its divisors is an integer number (167751).

2^1280533 is an apocalyptic number.

It is an amenable number.

1280533 is a deficient number, since it is larger than the sum of its proper divisors (61475).

1280533 is an equidigital number, since it uses as much as digits as its factorization.

1280533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1280533 is about 1131.6063803284. The cubic root of 1280533 is about 108.5917732452.

The spelling of 1280533 in words is "one million, two hundred eighty thousand, five hundred thirty-three".