121667305 has 8 divisors (see below), whose sum is σ = 146129544. Its totient is φ = 97248000.

The previous prime is 121667303. The next prime is 121667321. The reversal of 121667305 is 503766121.

It can be written as a sum of positive squares in 4 ways, for example, as 17464041 + 104203264 = 4179^2 + 10208^2 .

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

It is not a de Polignac number, because 121667305 - 2¹ = 121667303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121667303) 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, 4126 + ... + 16135.

It is an arithmetic number, because the mean of its divisors is an integer number (18266193).

Almost surely, 2^121667305 is an apocalyptic number.

It is an amenable number.

121667305 is a deficient number, since it is larger than the sum of its proper divisors (24462239).

121667305 is a wasteful number, since it uses less digits than its factorization.

121667305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21467.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 121667305 is about 11030.2903406937. The cubic root of 121667305 is about 495.5163200782.

The spelling of 121667305 in words is "one hundred twenty-one million, six hundred sixty-seven thousand, three hundred five".