121685255 has 4 divisors (see below), whose sum is σ = 146022312. Its totient is φ = 97348200.

The previous prime is 121685243. The next prime is 121685279. The reversal of 121685255 is 552586121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121685255 - 2¹⁴ = 121668871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12168521 + ... + 12168530.

It is an arithmetic number, because the mean of its divisors is an integer number (36505578).

Almost surely, 2^121685255 is an apocalyptic number.

121685255 is a deficient number, since it is larger than the sum of its proper divisors (24337057).

121685255 is an equidigital number, since it uses as much as digits as its factorization.

121685255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24337056.

The product of its digits is 24000, while the sum is 35.

The square root of 121685255 is about 11031.1039792035. The cubic root of 121685255 is about 495.5406872944.

The spelling of 121685255 in words is "one hundred twenty-one million, six hundred eighty-five thousand, two hundred fifty-five".