121895757 has 6 divisors (see below), whose sum is σ = 176071662.
Its totient is φ = 81263832.
The previous prime is 121895737. The next prime is 121895759. The reversal of 121895757 is 757598121.
It can be written as a sum of positive squares in only one way, i.e., 95824521 + 26071236 = 9789^2 + 5106^2
It is not a de Polignac number, because 121895757 - 219 = 121371469 is a prime.
It is a zygodrome in base 3.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (121895759) 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 5 ways as a sum of consecutive naturals, for example, 6771978 + ... + 6771995.
It is an arithmetic number, because the mean of its divisors is an integer number (29345277).
Almost surely, 2121895757 is an apocalyptic number.
It is an amenable number.
121895757 is a deficient number, since it is larger than the sum of its proper divisors (54175905).
121895757 is a wasteful number, since it uses less digits than its factorization.
121895757 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13543979 (or 13543976 counting only the distinct ones).
The product of its digits is 176400, while the sum is 45.
The square root of 121895757 is about 11040.6411498608.
The cubic root of 121895757 is about 495.8262661673.
The spelling of 121895757 in words is "one hundred twenty-one million, eight hundred ninety-five thousand, seven hundred fifty-seven".