121640960 has 96 divisors (see below), whose sum is σ = 333758880. Its totient is φ = 41680896.

The previous prime is 121640957. The next prime is 121640969. The reversal of 121640960 is 69046121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121640969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70832 + ... + 72528.

It is an arithmetic number, because the mean of its divisors is an integer number (3476655).

Almost surely, 2^121640960 is an apocalyptic number.

121640960 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 121640960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166879440).

121640960 is an abundant number, since it is smaller than the sum of its proper divisors (212117920).

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

121640960 is an equidigital number, since it uses as much as digits as its factorization.

121640960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731 (or 1711 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 121640960 is about 11029.0960645014. The cubic root of 121640960 is about 495.4805522665.

The spelling of 121640960 in words is "one hundred twenty-one million, six hundred forty thousand, nine hundred sixty".