121278655 has 8 divisors (see below), whose sum is σ = 151862112. Its totient is φ = 92804448.

The previous prime is 121278649. The next prime is 121278673. The reversal of 121278655 is 556872121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121278655 - 2¹³ = 121270463 is a prime.

It is a Duffinian 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, 527184 + ... + 527413.

It is an arithmetic number, because the mean of its divisors is an integer number (18982764).

Almost surely, 2^121278655 is an apocalyptic number.

121278655 is a deficient number, since it is larger than the sum of its proper divisors (30583457).

121278655 is a wasteful number, since it uses less digits than its factorization.

121278655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054625.

The product of its digits is 33600, while the sum is 37.

The square root of 121278655 is about 11012.6588524298. The cubic root of 121278655 is about 494.9881369806.

The spelling of 121278655 in words is "one hundred twenty-one million, two hundred seventy-eight thousand, six hundred fifty-five".