121580671 has 4 divisors (see below), whose sum is σ = 122696200. Its totient is φ = 120465144.

The previous prime is 121580653. The next prime is 121580687. The reversal of 121580671 is 176085121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121580671 - 2⁹ = 121580159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121580971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557601 + ... + 557818.

It is an arithmetic number, because the mean of its divisors is an integer number (30674050).

Almost surely, 2^121580671 is an apocalyptic number.

121580671 is a deficient number, since it is larger than the sum of its proper divisors (1115529).

121580671 is a wasteful number, since it uses less digits than its factorization.

121580671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115528.

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 121580671 is about 11026.3625461890. The cubic root of 121580671 is about 495.3986802733.

The spelling of 121580671 in words is "one hundred twenty-one million, five hundred eighty thousand, six hundred seventy-one".