121698240 has 112 divisors (see below), whose sum is σ = 409175712. Its totient is φ = 30539776.

The previous prime is 121698163. The next prime is 121698271. The reversal of 121698240 is 42896121.

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 15 ways as a sum of consecutive naturals, for example, 12592 + ... + 20048.

Almost surely, 2^121698240 is an apocalyptic number.

121698240 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 121698240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204587856).

121698240 is an abundant number, since it is smaller than the sum of its proper divisors (287477472).

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

121698240 is a wasteful number, since it uses less digits than its factorization.

121698240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7494 (or 7484 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 121698240 is about 11031.6925265346. The cubic root of 121698240 is about 495.5583130042.

The spelling of 121698240 in words is "one hundred twenty-one million, six hundred ninety-eight thousand, two hundred forty".