121994787 has 8 divisors (see below), whose sum is σ = 162751680. Its totient is φ = 81283880.

The previous prime is 121994777. The next prime is 121994797. The reversal of 121994787 is 787499121.

It is an interprime number because it is at equal distance from previous prime (121994777) and next prime (121994797).

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 121994787 - 2¹⁰ = 121993763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121994707) 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, 4737 + ... + 16322.

It is an arithmetic number, because the mean of its divisors is an integer number (20343960).

Almost surely, 2^121994787 is an apocalyptic number.

121994787 is a deficient number, since it is larger than the sum of its proper divisors (40756893).

121994787 is a wasteful number, since it uses less digits than its factorization.

121994787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22993.

The product of its digits is 254016, while the sum is 48.

The square root of 121994787 is about 11045.1250332443. The cubic root of 121994787 is about 495.9605021335.

The spelling of 121994787 in words is "one hundred twenty-one million, nine hundred ninety-four thousand, seven hundred eighty-seven".