1282561 has 8 divisors (see below), whose sum is σ = 1500224. Its totient is φ = 1073520.

The previous prime is 1282543. The next prime is 1282571. The reversal of 1282561 is 1652821.

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

It is not a de Polignac number, because 1282561 - 2⁵ = 1282529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1282511) 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 7 ways as a sum of consecutive naturals, for example, 1830 + ... + 2431.

It is an arithmetic number, because the mean of its divisors is an integer number (187528).

2^1282561 is an apocalyptic number.

It is an amenable number.

1282561 is a deficient number, since it is larger than the sum of its proper divisors (217663).

1282561 is an equidigital number, since it uses as much as digits as its factorization.

1282561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4311.

The product of its digits is 960, while the sum is 25.

The square root of 1282561 is about 1132.5020971283. The cubic root of 1282561 is about 108.6490691683.

The spelling of 1282561 in words is "one million, two hundred eighty-two thousand, five hundred sixty-one".