1288667 has 8 divisors (see below), whose sum is σ = 1377024. Its totient is φ = 1203048.

The previous prime is 1288657. The next prime is 1288691. The reversal of 1288667 is 7668821.

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 1288667 - 2⁶ = 1288603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1288667.

It is not an unprimeable number, because it can be changed into a prime (1288607) 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, 338 + ... + 1640.

It is an arithmetic number, because the mean of its divisors is an integer number (172128).

2^1288667 is an apocalyptic number.

1288667 is a deficient number, since it is larger than the sum of its proper divisors (88357).

1288667 is a wasteful number, since it uses less digits than its factorization.

1288667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369.

The product of its digits is 32256, while the sum is 38.

The square root of 1288667 is about 1135.1946969573. The cubic root of 1288667 is about 108.8212146402.

The spelling of 1288667 in words is "one million, two hundred eighty-eight thousand, six hundred sixty-seven".