121706643 has 8 divisors (see below), whose sum is σ = 162428368. Its totient is φ = 81061344.

The previous prime is 121706623. The next prime is 121706659. The reversal of 121706643 is 346607121.

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

It is not a de Polignac number, because 121706643 - 2¹² = 121702547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121706643.

It is not an unprimeable number, because it can be changed into a prime (121706623) by changing a digit.

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, 15280 + ... + 21837.

It is an arithmetic number, because the mean of its divisors is an integer number (20303546).

Almost surely, 2^121706643 is an apocalyptic number.

121706643 is a deficient number, since it is larger than the sum of its proper divisors (40721725).

121706643 is a wasteful number, since it uses less digits than its factorization.

121706643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38213.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 121706643 is about 11032.0733772034. The cubic root of 121706643 is about 495.5697184846.

The spelling of 121706643 in words is "one hundred twenty-one million, seven hundred six thousand, six hundred forty-three".