121707172 has 6 divisors (see below), whose sum is σ = 212987558. Its totient is φ = 60853584.

The previous prime is 121707107. The next prime is 121707181. The reversal of 121707172 is 271707121.

It can be written as a sum of positive squares in only one way, i.e., 113720896 + 7986276 = 10664^2 + 2826^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121707172.

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 as a sum of consecutive naturals, namely, 15213393 + ... + 15213400.

Almost surely, 2^121707172 is an apocalyptic number.

It is an amenable number.

121707172 is a deficient number, since it is larger than the sum of its proper divisors (91280386).

121707172 is a wasteful number, since it uses less digits than its factorization.

121707172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30426797 (or 30426795 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 28.

The square root of 121707172 is about 11032.0973527249. The cubic root of 121707172 is about 495.5704364843.

The spelling of 121707172 in words is "one hundred twenty-one million, seven hundred seven thousand, one hundred seventy-two".