121804158 has 16 divisors (see below), whose sum is σ = 278409600. Its totient is φ = 34801176.

The previous prime is 121804139. The next prime is 121804187. The reversal of 121804158 is 851408121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1450008 + ... + 1450091.

It is an arithmetic number, because the mean of its divisors is an integer number (17400600).

Almost surely, 2^121804158 is an apocalyptic number.

121804158 is an abundant number, since it is smaller than the sum of its proper divisors (156605442).

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

121804158 is a wasteful number, since it uses less digits than its factorization.

121804158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900111.

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 121804158 is about 11036.4921057372. The cubic root of 121804158 is about 495.7020382414.

The spelling of 121804158 in words is "one hundred twenty-one million, eight hundred four thousand, one hundred fifty-eight".