121928975 has 12 divisors (see below), whose sum is σ = 172791024. Its totient is φ = 83608320.

The previous prime is 121928969. The next prime is 121928977. The reversal of 121928975 is 579829121.

It is a happy number.

It is not a de Polignac number, because 121928975 - 2¹⁰ = 121927951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121928977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348194 + ... + 348543.

It is an arithmetic number, because the mean of its divisors is an integer number (14399252).

Almost surely, 2^121928975 is an apocalyptic number.

121928975 is a deficient number, since it is larger than the sum of its proper divisors (50862049).

121928975 is an equidigital number, since it uses as much as digits as its factorization.

121928975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696754 (or 696749 counting only the distinct ones).

The product of its digits is 90720, while the sum is 44.

The square root of 121928975 is about 11042.1453984269. The cubic root of 121928975 is about 495.8713015359.

The spelling of 121928975 in words is "one hundred twenty-one million, nine hundred twenty-eight thousand, nine hundred seventy-five".