121046728 has 16 divisors (see below), whose sum is σ = 247595760. Its totient is φ = 55021200.

The previous prime is 121046713. The next prime is 121046729. The reversal of 121046728 is 827640121.

It is a self number, because there is not a number n which added to its sum of digits gives 121046728.

It is not an unprimeable number, because it can be changed into a prime (121046729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687678 + ... + 687853.

It is an arithmetic number, because the mean of its divisors is an integer number (15474735).

Almost surely, 2^121046728 is an apocalyptic number.

It is an amenable number.

121046728 is an abundant number, since it is smaller than the sum of its proper divisors (126549032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121046728 is a wasteful number, since it uses less digits than its factorization.

121046728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375548 (or 1375544 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 121046728 is about 11002.1237949770. The cubic root of 121046728 is about 494.6724057653.

Adding to 121046728 its reverse (827640121), we get a palindrome (948686849).

The spelling of 121046728 in words is "one hundred twenty-one million, forty-six thousand, seven hundred twenty-eight".