121455904 has 48 divisors (see below), whose sum is σ = 258552000. Its totient is φ = 55966464.

The previous prime is 121455883. The next prime is 121455977. The reversal of 121455904 is 409554121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19797 + ... + 25195.

It is an arithmetic number, because the mean of its divisors is an integer number (5386500).

Almost surely, 2^121455904 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 121455904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129276000).

121455904 is an abundant number, since it is smaller than the sum of its proper divisors (137096096).

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

121455904 is a wasteful number, since it uses less digits than its factorization.

121455904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5465 (or 5457 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 121455904 is about 11020.7034258254. The cubic root of 121455904 is about 495.2291616544.

The spelling of 121455904 in words is "one hundred twenty-one million, four hundred fifty-five thousand, nine hundred four".