121606 has 8 divisors (see below), whose sum is σ = 186984. Its totient is φ = 59280.

The previous prime is 121591. The next prime is 121607. The reversal of 121606 is 606121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121607) by changing a digit.

121606 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660 + ... + 823.

It is an arithmetic number, because the mean of its divisors is an integer number (23373).

2¹²¹⁶⁰⁶ is an apocalyptic number.

121606 is a deficient number, since it is larger than the sum of its proper divisors (65378).

121606 is a wasteful number, since it uses less digits than its factorization.

121606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 121606 is about 348.7205184672. The cubic root of 121606 is about 49.5433080154.

Adding to 121606 its reverse (606121), we get a palindrome (727727).

It can be divided in two parts, 121 and 606, that added together give a palindrome (727).

The spelling of 121606 in words is "one hundred twenty-one thousand, six hundred six".