121704957 has 16 divisors (see below), whose sum is σ = 196695360. Its totient is φ = 73760400.

The previous prime is 121704883. The next prime is 121704959. The reversal of 121704957 is 759407121.

It is a happy number.

It is not a de Polignac number, because 121704957 - 2⁷ = 121704829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121704959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204594 + ... + 205187.

It is an arithmetic number, because the mean of its divisors is an integer number (12293460).

Almost surely, 2^121704957 is an apocalyptic number.

It is an amenable number.

121704957 is a deficient number, since it is larger than the sum of its proper divisors (74990403).

121704957 is a wasteful number, since it uses less digits than its factorization.

121704957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409801 (or 409795 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 121704957 is about 11031.9969633788. The cubic root of 121704957 is about 495.5674301011.

It can be divided in two parts, 121 and 704957, that added together give a triangular number (705078 = T₁₁₈₇).

The spelling of 121704957 in words is "one hundred twenty-one million, seven hundred four thousand, nine hundred fifty-seven".