121605313 has 8 divisors (see below), whose sum is σ = 124896960. Its totient is φ = 118354800.

The previous prime is 121605293. The next prime is 121605329. The reversal of 121605313 is 313506121.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121605313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121605353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4245 + ... + 16162.

It is an arithmetic number, because the mean of its divisors is an integer number (15612120).

Almost surely, 2^121605313 is an apocalyptic number.

It is an amenable number.

121605313 is a deficient number, since it is larger than the sum of its proper divisors (3291647).

121605313 is a wasteful number, since it uses less digits than its factorization.

121605313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20567.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 121605313 is about 11027.4799024981. The cubic root of 121605313 is about 495.4321471874.

The spelling of 121605313 in words is "one hundred twenty-one million, six hundred five thousand, three hundred thirteen".