121925 has 6 divisors (see below), whose sum is σ = 151218. Its totient is φ = 97520.

The previous prime is 121921. The next prime is 121931. The reversal of 121925 is 529121.

121925 = T₈₆ + T₈₇ + ... + T₁₁₀.

It can be written as a sum of positive squares in 3 ways, for example, as 2209 + 119716 = 47^2 + 346^2 .

It is not a de Polignac number, because 121925 - 2² = 121921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121897 and 121906.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 121925.

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 5 ways as a sum of consecutive naturals, for example, 2414 + ... + 2463.

It is an arithmetic number, because the mean of its divisors is an integer number (25203).

2¹²¹⁹²⁵ is an apocalyptic number.

It is an amenable number.

121925 is a deficient number, since it is larger than the sum of its proper divisors (29293).

121925 is an equidigital number, since it uses as much as digits as its factorization.

121925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4887 (or 4882 counting only the distinct ones).

The product of its digits is 180, while the sum is 20.

The square root of 121925 is about 349.1776052384. The cubic root of 121925 is about 49.5865912853.

The spelling of 121925 in words is "one hundred twenty-one thousand, nine hundred twenty-five".