121707 has 6 divisors (see below), whose sum is σ = 175812. Its totient is φ = 81132.

The previous prime is 121697. The next prime is 121711. The reversal of 121707 is 707121.

Added to its reverse (707121) it gives a triangular number (828828 = T₁₂₈₇).

121707 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 121707 - 2⁷ = 121579 is a prime.

121707 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 121707.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 121707.

It is not an unprimeable number, because it can be changed into a prime (121727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6753 + ... + 6770.

It is an arithmetic number, because the mean of its divisors is an integer number (29302).

2¹²¹⁷⁰⁷ is an apocalyptic number.

121707 is a deficient number, since it is larger than the sum of its proper divisors (54105).

121707 is a wasteful number, since it uses less digits than its factorization.

121707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13529 (or 13526 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 121707 is about 348.8653035199. The cubic root of 121707 is about 49.5570203033.

Adding to 121707 its reverse (707121), we get a palindrome (828828).

It can be divided in two parts, 121 and 707, that added together give a palindrome (828).

The spelling of 121707 in words is "one hundred twenty-one thousand, seven hundred seven", and thus it is an iban number.