121992648 has 64 divisors (see below), whose sum is σ = 313588800. Its totient is φ = 39532800.

The previous prime is 121992643. The next prime is 121992649. The reversal of 121992648 is 846299121.

It is not an unprimeable number, because it can be changed into a prime (121992641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142590 + ... + 143442.

It is an arithmetic number, because the mean of its divisors is an integer number (4899825).

Almost surely, 2^121992648 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 121992648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156794400).

121992648 is an abundant number, since it is smaller than the sum of its proper divisors (191596152).

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

121992648 is a wasteful number, since it uses less digits than its factorization.

121992648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022 (or 1018 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 121992648 is about 11045.0282027707. The cubic root of 121992648 is about 495.9576034695.

The spelling of 121992648 in words is "one hundred twenty-one million, nine hundred ninety-two thousand, six hundred forty-eight".