121913975 has 12 divisors (see below), whose sum is σ = 159130440. Its totient is φ = 92397600.

The previous prime is 121913959. The next prime is 121913977. The reversal of 121913975 is 579319121.

It is not a de Polignac number, because 121913975 - 2⁴ = 121913959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121913977) 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, 127856 + ... + 128805.

It is an arithmetic number, because the mean of its divisors is an integer number (13260870).

Almost surely, 2^121913975 is an apocalyptic number.

121913975 is a deficient number, since it is larger than the sum of its proper divisors (37216465).

121913975 is a wasteful number, since it uses less digits than its factorization.

121913975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256690 (or 256685 counting only the distinct ones).

The product of its digits is 17010, while the sum is 38.

The square root of 121913975 is about 11041.4661617015. The cubic root of 121913975 is about 495.8509662695.

The spelling of 121913975 in words is "one hundred twenty-one million, nine hundred thirteen thousand, nine hundred seventy-five".