121375 has 8 divisors (see below), whose sum is σ = 151632. Its totient is φ = 97000.

The previous prime is 121369. The next prime is 121379. The reversal of 121375 is 573121.

It is not a de Polignac number, because 121375 - 2³ = 121367 is a prime.

It is a Duffinian number.

121375 is a lucky number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361 + ... + 610.

It is an arithmetic number, because the mean of its divisors is an integer number (18954).

2¹²¹³⁷⁵ is an apocalyptic number.

121375 is a deficient number, since it is larger than the sum of its proper divisors (30257).

121375 is an frugal number, since it uses more digits than its factorization.

121375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986 (or 976 counting only the distinct ones).

The product of its digits is 210, while the sum is 19.

The square root of 121375 is about 348.3891502329. The cubic root of 121375 is about 49.5119176828.

Adding to 121375 its reverse (573121), we get a palindrome (694496).

It can be divided in two parts, 121 and 375, that added together give a triangular number (496 = T₃₁).

The spelling of 121375 in words is "one hundred twenty-one thousand, three hundred seventy-five".