122128585 has 4 divisors (see below), whose sum is σ = 146554308. Its totient is φ = 97702864.

The previous prime is 122128583. The next prime is 122128619. The reversal of 122128585 is 585821221.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 66536649 + 55591936 = 8157^2 + 7456^2 .

It is a cyclic number.

It is not a de Polignac number, because 122128585 - 2¹ = 122128583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122128585.

It is not an unprimeable number, because it can be changed into a prime (122128583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12212854 + ... + 12212863.

It is an arithmetic number, because the mean of its divisors is an integer number (36638577).

Almost surely, 2^122128585 is an apocalyptic number.

It is an amenable number.

122128585 is a deficient number, since it is larger than the sum of its proper divisors (24425723).

122128585 is an equidigital number, since it uses as much as digits as its factorization.

122128585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24425722.

The product of its digits is 12800, while the sum is 34.

The square root of 122128585 is about 11051.1802537105. The cubic root of 122128585 is about 496.1417510761.

The spelling of 122128585 in words is "one hundred twenty-two million, one hundred twenty-eight thousand, five hundred eighty-five".