121408392 has 32 divisors (see below), whose sum is σ = 346881600. Its totient is φ = 34688064.

The previous prime is 121408351. The next prime is 121408409. The reversal of 121408392 is 293804121.

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, 361167 + ... + 361502.

It is an arithmetic number, because the mean of its divisors is an integer number (10840050).

Almost surely, 2^121408392 is an apocalyptic number.

121408392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121408392 is an abundant number, since it is smaller than the sum of its proper divisors (225473208).

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

121408392 is a wasteful number, since it uses less digits than its factorization.

121408392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722685 (or 722681 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 121408392 is about 11018.5476356914. The cubic root of 121408392 is about 495.1645774557.

The spelling of 121408392 in words is "one hundred twenty-one million, four hundred eight thousand, three hundred ninety-two".