121685684 has 12 divisors (see below), whose sum is σ = 213218208. Its totient is φ = 60766200.

The previous prime is 121685651. The next prime is 121685689. The reversal of 121685684 is 486586121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121685689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15512 + ... + 21999.

It is an arithmetic number, because the mean of its divisors is an integer number (17768184).

Almost surely, 2^121685684 is an apocalyptic number.

It is an amenable number.

121685684 is a deficient number, since it is larger than the sum of its proper divisors (91532524).

121685684 is a wasteful number, since it uses less digits than its factorization.

121685684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38326 (or 38324 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The square root of 121685684 is about 11031.1234242030. The cubic root of 121685684 is about 495.5412696348.

The spelling of 121685684 in words is "one hundred twenty-one million, six hundred eighty-five thousand, six hundred eighty-four".