1289065 has 8 divisors (see below), whose sum is σ = 1554048. Its totient is φ = 1026480.

The previous prime is 1289053. The next prime is 1289077. The reversal of 1289065 is 5609821.

It is an interprime number because it is at equal distance from previous prime (1289053) and next prime (1289077).

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

It is a de Polignac number, because none of the positive numbers 2^k-1289065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960 + ... + 1870.

It is an arithmetic number, because the mean of its divisors is an integer number (194256).

2^1289065 is an apocalyptic number.

It is an amenable number.

1289065 is a deficient number, since it is larger than the sum of its proper divisors (264983).

1289065 is an equidigital number, since it uses as much as digits as its factorization.

1289065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1289065 is about 1135.3699837498. The cubic root of 1289065 is about 108.8324164959.

The spelling of 1289065 in words is "one million, two hundred eighty-nine thousand, sixty-five".