122205887 has 4 divisors (see below), whose sum is σ = 122234880. Its totient is φ = 122176896.

The previous prime is 122205883. The next prime is 122205899. The reversal of 122205887 is 788502221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122205887 - 2² = 122205883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122205883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6818 + ... + 17055.

It is an arithmetic number, because the mean of its divisors is an integer number (30558720).

Almost surely, 2^122205887 is an apocalyptic number.

122205887 is a deficient number, since it is larger than the sum of its proper divisors (28993).

122205887 is an equidigital number, since it uses as much as digits as its factorization.

122205887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28992.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 122205887 is about 11054.6771549422. The cubic root of 122205887 is about 496.2464076030.

The spelling of 122205887 in words is "one hundred twenty-two million, two hundred five thousand, eight hundred eighty-seven".