121606559 has 8 divisors (see below), whose sum is σ = 128887200. Its totient is φ = 114340096.

The previous prime is 121606553. The next prime is 121606567. The reversal of 121606559 is 955606121.

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

It is not a de Polignac number, because 121606559 - 2¹⁶ = 121541023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121606553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17867 + ... + 23715.

It is an arithmetic number, because the mean of its divisors is an integer number (16110900).

Almost surely, 2^121606559 is an apocalyptic number.

121606559 is a deficient number, since it is larger than the sum of its proper divisors (7280641).

121606559 is a wasteful number, since it uses less digits than its factorization.

121606559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7089.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 121606559 is about 11027.5363975822. The cubic root of 121606559 is about 495.4338392910.

The spelling of 121606559 in words is "one hundred twenty-one million, six hundred six thousand, five hundred fifty-nine".