121865448 has 64 divisors (see below), whose sum is σ = 313931520. Its totient is φ = 39398400.

The previous prime is 121865423. The next prime is 121865507. The reversal of 121865448 is 844568121.

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, 266436 + ... + 266892.

It is an arithmetic number, because the mean of its divisors is an integer number (4905180).

Almost surely, 2^121865448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121865448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156965760).

121865448 is an abundant number, since it is smaller than the sum of its proper divisors (192066072).

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

121865448 is a wasteful number, since it uses less digits than its factorization.

121865448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 774 counting only the distinct ones).

The product of its digits is 61440, while the sum is 39.

The square root of 121865448 is about 11039.2684540236. The cubic root of 121865448 is about 495.7851675423.

It can be divided in two parts, 1218 and 65448, that added together give a palindrome (66666).

The spelling of 121865448 in words is "one hundred twenty-one million, eight hundred sixty-five thousand, four hundred forty-eight".