121159687 has 8 divisors (see below), whose sum is σ = 136438272. Its totient is φ = 106591800.

The previous prime is 121159679. The next prime is 121159721. The reversal of 121159687 is 786951121.

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 not a de Polignac number, because 121159687 - 2³ = 121159679 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121159657) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 177313 + ... + 177994.

It is an arithmetic number, because the mean of its divisors is an integer number (17054784).

Almost surely, 2^121159687 is an apocalyptic number.

121159687 is a deficient number, since it is larger than the sum of its proper divisors (15278585).

121159687 is a wasteful number, since it uses less digits than its factorization.

121159687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355349.

The product of its digits is 30240, while the sum is 40.

The square root of 121159687 is about 11007.2561067688. The cubic root of 121159687 is about 494.8262315614.

The spelling of 121159687 in words is "one hundred twenty-one million, one hundred fifty-nine thousand, six hundred eighty-seven".