121981594 has 16 divisors (see below), whose sum is σ = 209305728. Its totient is φ = 52229232.

The previous prime is 121981589. The next prime is 121981603. The reversal of 121981594 is 495189121.

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, 14467 + ... + 21289.

It is an arithmetic number, because the mean of its divisors is an integer number (13081608).

Almost surely, 2^121981594 is an apocalyptic number.

121981594 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

121981594 is a deficient number, since it is larger than the sum of its proper divisors (87324134).

121981594 is a wasteful number, since it uses less digits than its factorization.

121981594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8109.

The product of its digits is 25920, while the sum is 40.

The square root of 121981594 is about 11044.5277852881. The cubic root of 121981594 is about 495.9426231106.

The spelling of 121981594 in words is "one hundred twenty-one million, nine hundred eighty-one thousand, five hundred ninety-four".