121554688 has 36 divisors (see below), whose sum is σ = 243399520. Its totient is φ = 60585984.

The previous prime is 121554659. The next prime is 121554703. The reversal of 121554688 is 886455121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121554688.

It is a congruent number.

It is an unprimeable number.

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, 116473 + ... + 117511.

Almost surely, 2^121554688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121554688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121699760).

121554688 is an abundant number, since it is smaller than the sum of its proper divisors (121844832).

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

121554688 is an equidigital number, since it uses as much as digits as its factorization.

121554688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512 (or 1498 counting only the distinct ones).

The product of its digits is 76800, while the sum is 40.

The square root of 121554688 is about 11025.1842614988. The cubic root of 121554688 is about 495.3633872154.

The spelling of 121554688 in words is "one hundred twenty-one million, five hundred fifty-four thousand, six hundred eighty-eight".