121756756 has 36 divisors (see below), whose sum is σ = 243036864. Its totient is φ = 52927600.

The previous prime is 121756721. The next prime is 121756759. The reversal of 121756756 is 657657121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121756759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20661 + ... + 25891.

It is an arithmetic number, because the mean of its divisors is an integer number (6751024).

Almost surely, 2^121756756 is an apocalyptic number.

It is an amenable number.

121756756 is a deficient number, since it is larger than the sum of its proper divisors (121280108).

121756756 is a wasteful number, since it uses less digits than its factorization.

121756756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5292 (or 5267 counting only the distinct ones).

The product of its digits is 88200, while the sum is 40.

The square root of 121756756 is about 11034.3443846927. The cubic root of 121756756 is about 495.6377264884.

The spelling of 121756756 in words is "one hundred twenty-one million, seven hundred fifty-six thousand, seven hundred fifty-six".