121646605 has 8 divisors (see below), whose sum is σ = 147393792. Its totient is φ = 96372048.

The previous prime is 121646599. The next prime is 121646617. The reversal of 121646605 is 506646121.

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 121646605 - 2³ = 121646597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117589 + ... + 118618.

It is an arithmetic number, because the mean of its divisors is an integer number (18424224).

Almost surely, 2^121646605 is an apocalyptic number.

It is an amenable number.

121646605 is a deficient number, since it is larger than the sum of its proper divisors (25747187).

121646605 is a wasteful number, since it uses less digits than its factorization.

121646605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236315.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 121646605 is about 11029.3519755242. The cubic root of 121646605 is about 495.4882167474.

It can be divided in two parts, 12164 and 6605, that added together give a square (18769 = 137²).

The spelling of 121646605 in words is "one hundred twenty-one million, six hundred forty-six thousand, six hundred five".