121858408 has 32 divisors (see below), whose sum is σ = 262388160. Its totient is φ = 51972480.

The previous prime is 121858391. The next prime is 121858411. The reversal of 121858408 is 804858121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6660 + ... + 16972.

It is an arithmetic number, because the mean of its divisors is an integer number (8199630).

Almost surely, 2^121858408 is an apocalyptic number.

It is an amenable number.

121858408 is an abundant number, since it is smaller than the sum of its proper divisors (140529752).

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

121858408 is a wasteful number, since it uses less digits than its factorization.

121858408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10537 (or 10533 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 37.

The square root of 121858408 is about 11038.9495877099. The cubic root of 121858408 is about 495.7756204151.

The spelling of 121858408 in words is "one hundred twenty-one million, eight hundred fifty-eight thousand, four hundred eight".