121654009 has 8 divisors (see below), whose sum is σ = 124644960. Its totient is φ = 118670496.

The previous prime is 121654003. The next prime is 121654031. The reversal of 121654009 is 900456121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121654009 - 2¹⁹ = 121129721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121654003) by changing a digit.

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, 45882 + ... + 48460.

It is an arithmetic number, because the mean of its divisors is an integer number (15580620).

Almost surely, 2^121654009 is an apocalyptic number.

It is an amenable number.

121654009 is a deficient number, since it is larger than the sum of its proper divisors (2990951).

121654009 is a wasteful number, since it uses less digits than its factorization.

121654009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3719.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 121654009 is about 11029.6876202366. The cubic root of 121654009 is about 495.4982691455.

It can be divided in two parts, 1216 and 54009, that added together give a square (55225 = 235²).

The spelling of 121654009 in words is "one hundred twenty-one million, six hundred fifty-four thousand, nine".