121683240 has 192 divisors, whose sum is σ = 457142400. Its totient is φ = 27495936.

The previous prime is 121683187. The next prime is 121683253. The reversal of 121683240 is 42386121.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 274459 + ... + 274901.

It is an arithmetic number, because the mean of its divisors is an integer number (2380950).

Almost surely, 2^121683240 is an apocalyptic number.

121683240 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 121683240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228571200).

121683240 is an abundant number, since it is smaller than the sum of its proper divisors (335459160).

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

121683240 is a wasteful number, since it uses less digits than its factorization.

121683240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 121683240 is about 11031.0126461717. The cubic root of 121683240 is about 495.5379520411.

The spelling of 121683240 in words is "one hundred twenty-one million, six hundred eighty-three thousand, two hundred forty".