1289896 has 8 divisors (see below), whose sum is σ = 2418570. Its totient is φ = 644944.

The previous prime is 1289881. The next prime is 1289921. The reversal of 1289896 is 6989821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1276900 + 12996 = 1130^2 + 114^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80611 + ... + 80626.

2^1289896 is an apocalyptic number.

It is an amenable number.

1289896 is a deficient number, since it is larger than the sum of its proper divisors (1128674).

1289896 is a wasteful number, since it uses less digits than its factorization.

1289896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161243 (or 161239 counting only the distinct ones).

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

The square root of 1289896 is about 1135.7358847901. The cubic root of 1289896 is about 108.8557978643.

The spelling of 1289896 in words is "one million, two hundred eighty-nine thousand, eight hundred ninety-six".