121285955 has 16 divisors (see below), whose sum is σ = 167215104. Its totient is φ = 82727520.

The previous prime is 121285937. The next prime is 121285993. The reversal of 121285955 is 559582121.

It is a happy number.

It is not a de Polignac number, because 121285955 - 2⁸ = 121285699 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2387 + ... + 15756.

It is an arithmetic number, because the mean of its divisors is an integer number (10450944).

Almost surely, 2^121285955 is an apocalyptic number.

121285955 is a deficient number, since it is larger than the sum of its proper divisors (45929149).

121285955 is a wasteful number, since it uses less digits than its factorization.

121285955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18346.

The product of its digits is 36000, while the sum is 38.

The square root of 121285955 is about 11012.9902842053. The cubic root of 121285955 is about 494.9980682168.

The spelling of 121285955 in words is "one hundred twenty-one million, two hundred eighty-five thousand, nine hundred fifty-five".