122555889 has 32 divisors (see below), whose sum is σ = 185303040. Its totient is φ = 80042256.

The previous prime is 122555863. The next prime is 122555899. The reversal of 122555889 is 988555221.

It is a happy number.

122555889 is a `hidden beast` number, since 12 + 2 + 5 + 558 + 89 = 666.

It is not a de Polignac number, because 122555889 - 2⁷ = 122555761 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (122555809) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 353014 + ... + 353360.

It is an arithmetic number, because the mean of its divisors is an integer number (5790720).

Almost surely, 2^122555889 is an apocalyptic number.

It is an amenable number.

122555889 is a deficient number, since it is larger than the sum of its proper divisors (62747151).

122555889 is a wasteful number, since it uses less digits than its factorization.

122555889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 580 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The square root of 122555889 is about 11070.4963303368. The cubic root of 122555889 is about 496.7197118146.

The spelling of 122555889 in words is "one hundred twenty-two million, five hundred fifty-five thousand, eight hundred eighty-nine".