1289163521 has 8 divisors (see below), whose sum is σ = 1320405504. Its totient is φ = 1257978960.

The previous prime is 1289163481. The next prime is 1289163529. The reversal of 1289163521 is 1253619821.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1289163521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1289163529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32951 + ... + 60531.

It is an arithmetic number, because the mean of its divisors is an integer number (165050688).

Almost surely, 2^1289163521 is an apocalyptic number.

It is an amenable number.

1289163521 is a deficient number, since it is larger than the sum of its proper divisors (31241983).

1289163521 is a wasteful number, since it uses less digits than its factorization.

1289163521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28711.

The product of its digits is 25920, while the sum is 38.

The square root of 1289163521 is about 35904.9233532116. The cubic root of 1289163521 is about 1088.3518904947.

The spelling of 1289163521 in words is "one billion, two hundred eighty-nine million, one hundred sixty-three thousand, five hundred twenty-one".