121506 has 32 divisors (see below), whose sum is σ = 304128. Its totient is φ = 31440.

The previous prime is 121501. The next prime is 121507. The reversal of 121506 is 605121.

It is an Ulam number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (121501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331 + ... + 593.

It is an arithmetic number, because the mean of its divisors is an integer number (9504).

2¹²¹⁵⁰⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152064).

121506 is an abundant number, since it is smaller than the sum of its proper divisors (182622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121506 is a wasteful number, since it uses less digits than its factorization.

121506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 121506 is about 348.5771076821. The cubic root of 121506 is about 49.5297240107.

Adding to 121506 its reverse (605121), we get a palindrome (726627).

It can be divided in two parts, 12150 and 6, that multiplied together give a square (72900 = 270²).

The spelling of 121506 in words is "one hundred twenty-one thousand, five hundred six".