1289968 has 20 divisors (see below), whose sum is σ = 2568040. Its totient is φ = 627264.

The previous prime is 1289963. The next prime is 1289969. The reversal of 1289968 is 8699821.

It is a happy number.

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, 498 + ... + 1681.

It is an arithmetic number, because the mean of its divisors is an integer number (128402).

2^1289968 is an apocalyptic number.

It is an amenable number.

1289968 is a deficient number, since it is larger than the sum of its proper divisors (1278072).

1289968 is a wasteful number, since it uses less digits than its factorization.

1289968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224 (or 2218 counting only the distinct ones).

The product of its digits is 62208, while the sum is 43.

The square root of 1289968 is about 1135.7675818582. The cubic root of 1289968 is about 108.8578232140.

The spelling of 1289968 in words is "one million, two hundred eighty-nine thousand, nine hundred sixty-eight".