1288669 has 8 divisors (see below), whose sum is σ = 1326080. Its totient is φ = 1251936.

The previous prime is 1288657. The next prime is 1288691. The reversal of 1288669 is 9668821.

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

It is a cyclic number.

It is not a de Polignac number, because 1288669 - 2⁷ = 1288541 is a prime.

It is a super-2 number, since 2×1288669² = 3321335583122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9202 + ... + 9340.

It is an arithmetic number, because the mean of its divisors is an integer number (165760).

2^1288669 is an apocalyptic number.

It is an amenable number.

1288669 is a deficient number, since it is larger than the sum of its proper divisors (37411).

1288669 is a wasteful number, since it uses less digits than its factorization.

1288669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339.

The product of its digits is 41472, while the sum is 40.

The square root of 1288669 is about 1135.1955778631. The cubic root of 1288669 is about 108.8212709367.

The spelling of 1288669 in words is "one million, two hundred eighty-eight thousand, six hundred sixty-nine".