121042560 has 128 divisors (see below), whose sum is σ = 402744960. Its totient is φ = 30863360.

The previous prime is 121042547. The next prime is 121042589. The reversal of 121042560 is 65240121.

It is a tau number, because it is divible by the number of its divisors (128).

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, 42790 + ... + 45530.

It is an arithmetic number, because the mean of its divisors is an integer number (3146445).

Almost surely, 2^121042560 is an apocalyptic number.

121042560 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 121042560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201372480).

121042560 is an abundant number, since it is smaller than the sum of its proper divisors (281702400).

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

121042560 is a wasteful number, since it uses less digits than its factorization.

121042560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786 (or 2774 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 121042560 is about 11001.9343753724. The cubic root of 121042560 is about 494.6667280179. Note that the first 3 decimals are identical.

Adding to 121042560 its reverse (65240121), we get a palindrome (186282681).

The spelling of 121042560 in words is "one hundred twenty-one million, forty-two thousand, five hundred sixty".