121847755 has 8 divisors (see below), whose sum is σ = 154818432. Its totient is φ = 91744128.

The previous prime is 121847753. The next prime is 121847773. The reversal of 121847755 is 557748121.

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

It is a cyclic number.

It is not a de Polignac number, because 121847755 - 2¹ = 121847753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121847753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716667 + ... + 716836.

It is an arithmetic number, because the mean of its divisors is an integer number (19352304).

Almost surely, 2^121847755 is an apocalyptic number.

121847755 is a deficient number, since it is larger than the sum of its proper divisors (32970677).

121847755 is a wasteful number, since it uses less digits than its factorization.

121847755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433525.

The product of its digits is 78400, while the sum is 40.

The square root of 121847755 is about 11038.4670584280. The cubic root of 121847755 is about 495.7611729054.

The spelling of 121847755 in words is "one hundred twenty-one million, eight hundred forty-seven thousand, seven hundred fifty-five".