121825 has 12 divisors (see below), whose sum is σ = 165168. Its totient is φ = 88400.

The previous prime is 121789. The next prime is 121843. The reversal of 121825 is 528121.

It is not a de Polignac number, because 121825 - 2⁷ = 121697 is a prime.

It is a Duffinian number.

121825 is a lucky number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 54 + ... + 496.

It is an arithmetic number, because the mean of its divisors is an integer number (13764).

2¹²¹⁸²⁵ is an apocalyptic number.

It is an amenable number.

121825 is a deficient number, since it is larger than the sum of its proper divisors (43343).

121825 is a wasteful number, since it uses less digits than its factorization.

121825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 459 counting only the distinct ones).

The product of its digits is 160, while the sum is 19.

The square root of 121825 is about 349.0343822605. The cubic root of 121825 is about 49.5730309944.

Adding to 121825 its reverse (528121), we get a palindrome (649946).

It can be divided in two parts, 121 and 825, that added together give a triangular number (946 = T₄₃).

The spelling of 121825 in words is "one hundred twenty-one thousand, eight hundred twenty-five".