1289966 has 8 divisors (see below), whose sum is σ = 1956960. Its totient is φ = 637648.

The previous prime is 1289963. The next prime is 1289969. The reversal of 1289966 is 6699821.

It is an interprime number because it is at equal distance from previous prime (1289963) and next prime (1289969).

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289963) 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, 3446 + ... + 3801.

It is an arithmetic number, because the mean of its divisors is an integer number (244620).

2^1289966 is an apocalyptic number.

1289966 is a deficient number, since it is larger than the sum of its proper divisors (666994).

1289966 is an equidigital number, since it uses as much as digits as its factorization.

1289966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7338.

The product of its digits is 46656, while the sum is 41.

The square root of 1289966 is about 1135.7667013960. The cubic root of 1289966 is about 108.8577669553.

The spelling of 1289966 in words is "one million, two hundred eighty-nine thousand, nine hundred sixty-six".