121125 has 32 divisors (see below), whose sum is σ = 224640. Its totient is φ = 57600.

The previous prime is 121123. The next prime is 121139. The reversal of 121125 is 521121.

It is not a de Polignac number, because 121125 - 2¹ = 121123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6366 + ... + 6384.

It is an arithmetic number, because the mean of its divisors is an integer number (7020).

2¹²¹¹²⁵ is an apocalyptic number.

121125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121125 is a deficient number, since it is larger than the sum of its proper divisors (103515).

121125 is a wasteful number, since it uses less digits than its factorization.

121125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54 (or 44 counting only the distinct ones).

The product of its digits is 20, while the sum is 12.

The square root of 121125 is about 348.0301711059. The cubic root of 121125 is about 49.4779005524.

Adding to 121125 its reverse (521121), we get a palindrome (642246).

The spelling of 121125 in words is "one hundred twenty-one thousand, one hundred twenty-five".