121695 has 32 divisors (see below), whose sum is σ = 238080. Its totient is φ = 51840.

The previous prime is 121687. The next prime is 121697. The reversal of 121695 is 596121.

It is not a de Polignac number, because 121695 - 2³ = 121687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121697) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1965 + ... + 2025.

It is an arithmetic number, because the mean of its divisors is an integer number (7440).

121695 is a Friedman number, since it can be written as 95*61*21, using all its digits and the basic arithmetic operations.

2¹²¹⁶⁹⁵ is an apocalyptic number.

121695 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121695 is the 285-th pentagonal number.

121695 is a deficient number, since it is larger than the sum of its proper divisors (116385).

121695 is a wasteful number, since it uses less digits than its factorization.

121695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95.

The product of its digits is 540, while the sum is 24.

The square root of 121695 is about 348.8481044810. The cubic root of 121695 is about 49.5553915178. Note that the first 3 decimals are identical.

The spelling of 121695 in words is "one hundred twenty-one thousand, six hundred ninety-five".