121708 has 6 divisors (see below), whose sum is σ = 212996. Its totient is φ = 60852.

The previous prime is 121697. The next prime is 121711. The reversal of 121708 is 807121.

It is an unprimeable number.

121708 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 as a sum of consecutive naturals, namely, 15210 + ... + 15217.

2¹²¹⁷⁰⁸ is an apocalyptic number.

It is an amenable number.

121708 is a deficient number, since it is larger than the sum of its proper divisors (91288).

121708 is a wasteful number, since it uses less digits than its factorization.

121708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30431 (or 30429 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 121708 is about 348.8667367348. The cubic root of 121708 is about 49.5571560306.

Adding to 121708 its reverse (807121), we get a palindrome (928829).

The spelling of 121708 in words is "one hundred twenty-one thousand, seven hundred eight".