121869894 has 16 divisors (see below), whose sum is σ = 244026432. Its totient is φ = 40575528.

The previous prime is 121869883. The next prime is 121869953. The reversal of 121869894 is 498968121.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6204 + ... + 16799.

It is an arithmetic number, because the mean of its divisors is an integer number (15251652).

Almost surely, 2^121869894 is an apocalyptic number.

121869894 is an abundant number, since it is smaller than the sum of its proper divisors (122156538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121869894 is a wasteful number, since it uses less digits than its factorization.

121869894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23891.

The product of its digits is 248832, while the sum is 48.

The square root of 121869894 is about 11039.4698242262. The cubic root of 121869894 is about 495.7911966892.

The spelling of 121869894 in words is "one hundred twenty-one million, eight hundred sixty-nine thousand, eight hundred ninety-four".