121724070 has 64 divisors (see below), whose sum is σ = 331188480. Its totient is φ = 28384128.

The previous prime is 121724047. The next prime is 121724077. The reversal of 121724070 is 70427121.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121724070.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121724077) 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 31 ways as a sum of consecutive naturals, for example, 804 + ... + 15623.

It is an arithmetic number, because the mean of its divisors is an integer number (5174820).

Almost surely, 2^121724070 is an apocalyptic number.

121724070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121724070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165594240).

121724070 is an abundant number, since it is smaller than the sum of its proper divisors (209464410).

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

121724070 is a wasteful number, since it uses less digits than its factorization.

121724070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16469.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 121724070 is about 11032.8631823294. The cubic root of 121724070 is about 495.5933706619.

The spelling of 121724070 in words is "one hundred twenty-one million, seven hundred twenty-four thousand, seventy".