121858720 has 96 divisors (see below), whose sum is σ = 309609216. Its totient is φ = 45158400.

The previous prime is 121858717. The next prime is 121858801. The reversal of 121858720 is 27858121.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192805 + ... + 193435.

It is an arithmetic number, because the mean of its divisors is an integer number (3225096).

Almost surely, 2^121858720 is an apocalyptic number.

121858720 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 121858720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154804608).

121858720 is an abundant number, since it is smaller than the sum of its proper divisors (187750496).

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

121858720 is a wasteful number, since it uses less digits than its factorization.

121858720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 121858720 is about 11038.9637194802. The cubic root of 121858720 is about 495.7760435342.

The spelling of 121858720 in words is "one hundred twenty-one million, eight hundred fifty-eight thousand, seven hundred twenty".