121835 has 12 divisors (see below), whose sum is σ = 169968. Its totient is φ = 82128.

The previous prime is 121789. The next prime is 121843. The reversal of 121835 is 538121.

121835 = 2² + 3² + ... + 71².

It is not a de Polignac number, because 121835 - 2⁸ = 121579 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2036 + ... + 2094.

It is an arithmetic number, because the mean of its divisors is an integer number (14164).

2¹²¹⁸³⁵ is an apocalyptic number.

121835 is a deficient number, since it is larger than the sum of its proper divisors (48133).

121835 is an frugal number, since it uses more digits than its factorization.

121835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 71 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 121835 is about 349.0487072029. The cubic root of 121835 is about 49.5743873573.

Adding to 121835 its reverse (538121), we get a palindrome (659956).

The spelling of 121835 in words is "one hundred twenty-one thousand, eight hundred thirty-five".