122551587 has 12 divisors (see below), whose sum is σ = 182729664. Its totient is φ = 79065360.

The previous prime is 122551579. The next prime is 122551601. The reversal of 122551587 is 785155221.

122551587 is a `hidden beast` number, since 1 + 2 + 25 + 51 + 587 = 666.

It is not a de Polignac number, because 122551587 - 2³ = 122551579 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (122551537) 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 11 ways as a sum of consecutive naturals, for example, 219348 + ... + 219905.

It is an arithmetic number, because the mean of its divisors is an integer number (15227472).

Almost surely, 2^122551587 is an apocalyptic number.

122551587 is a deficient number, since it is larger than the sum of its proper divisors (60178077).

122551587 is a wasteful number, since it uses less digits than its factorization.

122551587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439290 (or 439287 counting only the distinct ones).

The product of its digits is 28000, while the sum is 36.

The square root of 122551587 is about 11070.3020284001. The cubic root of 122551587 is about 496.7138997365.

The spelling of 122551587 in words is "one hundred twenty-two million, five hundred fifty-one thousand, five hundred eighty-seven".