121256 has 16 divisors (see below), whose sum is σ = 237600. Its totient is φ = 57904.

The previous prime is 121229. The next prime is 121259. The reversal of 121256 is 652121.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (121259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146 + ... + 513.

It is an arithmetic number, because the mean of its divisors is an integer number (14850).

2¹²¹²⁵⁶ is an apocalyptic number.

It is an amenable number.

121256 is a deficient number, since it is larger than the sum of its proper divisors (116344).

121256 is a wasteful number, since it uses less digits than its factorization.

121256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 684 counting only the distinct ones).

The product of its digits is 120, while the sum is 17.

The square root of 121256 is about 348.2183223209. The cubic root of 121256 is about 49.4957313600.

Adding to 121256 its reverse (652121), we get a palindrome (773377).

It can be divided in two parts, 121 and 256, that multiplied together give a square (30976 = 176²).

The spelling of 121256 in words is "one hundred twenty-one thousand, two hundred fifty-six".