121928705 has 8 divisors (see below), whose sum is σ = 146567232. Its totient is φ = 97374448.

The previous prime is 121928699. The next prime is 121928707. The reversal of 121928705 is 507829121.

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 121928705 - 2⁴ = 121928689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121928707) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17837 + ... + 23706.

It is an arithmetic number, because the mean of its divisors is an integer number (18320904).

Almost surely, 2^121928705 is an apocalyptic number.

It is an amenable number.

121928705 is a deficient number, since it is larger than the sum of its proper divisors (24638527).

121928705 is an equidigital number, since it uses as much as digits as its factorization.

121928705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42135.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 121928705 is about 11042.1331725351. The cubic root of 121928705 is about 495.8709355158.

The spelling of 121928705 in words is "one hundred twenty-one million, nine hundred twenty-eight thousand, seven hundred five".