121875 has 24 divisors (see below), whose sum is σ = 218736. Its totient is φ = 60000.

The previous prime is 121867. The next prime is 121883. The reversal of 121875 is 578121.

It is an interprime number because it is at equal distance from previous prime (121867) and next prime (121883).

It is not a de Polignac number, because 121875 - 2³ = 121867 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9369 + ... + 9381.

It is an arithmetic number, because the mean of its divisors is an integer number (9114).

2¹²¹⁸⁷⁵ is an apocalyptic number.

121875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121875 is a deficient number, since it is larger than the sum of its proper divisors (96861).

121875 is an frugal number, since it uses more digits than its factorization.

121875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41 (or 21 counting only the distinct ones).

The product of its digits is 560, while the sum is 24.

The square root of 121875 is about 349.1060010942. The cubic root of 121875 is about 49.5798120670.

Adding to 121875 its reverse (578121), we get a palindrome (699996).

It can be divided in two parts, 12 and 1875, that multiplied together give a square (22500 = 150²).

The spelling of 121875 in words is "one hundred twenty-one thousand, eight hundred seventy-five".