121929 has 8 divisors (see below), whose sum is σ = 164640. Its totient is φ = 80256.

The previous prime is 121921. The next prime is 121931. The reversal of 121929 is 929121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121929 - 2³ = 121921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121899 and 121908.

It is not an unprimeable number, because it can be changed into a prime (121921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82 + ... + 500.

It is an arithmetic number, because the mean of its divisors is an integer number (20580).

2¹²¹⁹²⁹ is an apocalyptic number.

It is an amenable number.

121929 is a deficient number, since it is larger than the sum of its proper divisors (42711).

121929 is an equidigital number, since it uses as much as digits as its factorization.

121929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519.

The product of its digits is 324, while the sum is 24.

The square root of 121929 is about 349.1833329356. The cubic root of 121929 is about 49.5871335427.

The spelling of 121929 in words is "one hundred twenty-one thousand, nine hundred twenty-nine".