121428700 has 36 divisors (see below), whose sum is σ = 265061160. Its totient is φ = 48283840.

The previous prime is 121428691. The next prime is 121428701. The reversal of 121428700 is 7824121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121428701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13791 + ... + 20809.

It is an arithmetic number, because the mean of its divisors is an integer number (7362810).

Almost surely, 2^121428700 is an apocalyptic number.

121428700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121428700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132530580).

121428700 is an abundant number, since it is smaller than the sum of its proper divisors (143632460).

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

121428700 is a wasteful number, since it uses less digits than its factorization.

121428700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7206 (or 7199 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 121428700 is about 11019.4691342188. The cubic root of 121428700 is about 495.1921846676.

The spelling of 121428700 in words is "one hundred twenty-one million, four hundred twenty-eight thousand, seven hundred".