121706828 has 6 divisors (see below), whose sum is σ = 212986956. Its totient is φ = 60853412.

The previous prime is 121706821. The next prime is 121706831. The reversal of 121706828 is 828607121.

It is not an unprimeable number, because it can be changed into a prime (121706821) by changing a digit.

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, 15213350 + ... + 15213357.

It is an arithmetic number, because the mean of its divisors is an integer number (35497826).

Almost surely, 2^121706828 is an apocalyptic number.

It is an amenable number.

121706828 is a deficient number, since it is larger than the sum of its proper divisors (91280128).

121706828 is a wasteful number, since it uses less digits than its factorization.

121706828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30426711 (or 30426709 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 121706828 is about 11032.0817618435. The cubic root of 121706828 is about 495.5699695811.

The spelling of 121706828 in words is "one hundred twenty-one million, seven hundred six thousand, eight hundred twenty-eight".