1282889 has 4 divisors (see below), whose sum is σ = 1294356. Its totient is φ = 1271424.

The previous prime is 1282877. The next prime is 1282903. The reversal of 1282889 is 9882821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144400 + 1138489 = 380^2 + 1067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1282889 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 (1282289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5564 + ... + 5789.

It is an arithmetic number, because the mean of its divisors is an integer number (323589).

2^1282889 is an apocalyptic number.

It is an amenable number.

1282889 is a deficient number, since it is larger than the sum of its proper divisors (11467).

1282889 is a wasteful number, since it uses less digits than its factorization.

1282889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11466.

The product of its digits is 18432, while the sum is 38.

The square root of 1282889 is about 1132.6468999649. The cubic root of 1282889 is about 108.6583302892.

The spelling of 1282889 in words is "one million, two hundred eighty-two thousand, eight hundred eighty-nine".