1289135 has 8 divisors (see below), whose sum is σ = 1597056. Its totient is φ = 997920.

The previous prime is 1289129. The next prime is 1289149. The reversal of 1289135 is 5319821.

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-1289135 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1289098 and 1289107.

It is a congruent 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, 4004 + ... + 4313.

It is an arithmetic number, because the mean of its divisors is an integer number (199632).

2^1289135 is an apocalyptic number.

1289135 is a deficient number, since it is larger than the sum of its proper divisors (307921).

1289135 is an equidigital number, since it uses as much as digits as its factorization.

1289135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8353.

The product of its digits is 2160, while the sum is 29.

The square root of 1289135 is about 1135.4008102868. The cubic root of 1289135 is about 108.8343864331.

The spelling of 1289135 in words is "one million, two hundred eighty-nine thousand, one hundred thirty-five".