123555585 has 16 divisors (see below), whose sum is σ = 199912320. Its totient is φ = 65155200.

The previous prime is 123555583. The next prime is 123555587. The reversal of 123555585 is 585555321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123555583) and next prime (123555587).

It is not a de Polignac number, because 123555585 - 2¹ = 123555583 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123555581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44941 + ... + 47610.

It is an arithmetic number, because the mean of its divisors is an integer number (12494520).

Almost surely, 2^123555585 is an apocalyptic number.

123555585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123555585 is a deficient number, since it is larger than the sum of its proper divisors (76356735).

123555585 is an equidigital number, since it uses as much as digits as its factorization.

123555585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92648.

The product of its digits is 150000, while the sum is 39.

The square root of 123555585 is about 11115.5559914923. Note that the first 3 decimals coincide. The cubic root of 123555585 is about 498.0666472632.

The spelling of 123555585 in words is "one hundred twenty-three million, five hundred fifty-five thousand, five hundred eighty-five".