121994859 has 24 divisors (see below), whose sum is σ = 189641280. Its totient is φ = 69555024.

The previous prime is 121994843. The next prime is 121994867. The reversal of 121994859 is 958499121.

It is not a de Polignac number, because 121994859 - 2⁴ = 121994843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121994819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108072 + ... + 109194.

It is an arithmetic number, because the mean of its divisors is an integer number (7901720).

Almost surely, 2^121994859 is an apocalyptic number.

121994859 is a deficient number, since it is larger than the sum of its proper divisors (67646421).

121994859 is a wasteful number, since it uses less digits than its factorization.

121994859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879 (or 1872 counting only the distinct ones).

The product of its digits is 233280, while the sum is 48.

The square root of 121994859 is about 11045.1282926003. The cubic root of 121994859 is about 495.9605997037.

The spelling of 121994859 in words is "one hundred twenty-one million, nine hundred ninety-four thousand, eight hundred fifty-nine".