123204655 has 16 divisors (see below), whose sum is σ = 171284544. Its totient is φ = 83324160.

The previous prime is 123204623. The next prime is 123204659. The reversal of 123204655 is 556402321.

It is not a de Polignac number, because 123204655 - 2⁵ = 123204623 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 (123204659) 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, 21556 + ... + 26665.

It is an arithmetic number, because the mean of its divisors is an integer number (10705284).

Almost surely, 2^123204655 is an apocalyptic number.

123204655 is a deficient number, since it is larger than the sum of its proper divisors (48079889).

123204655 is an equidigital number, since it uses as much as digits as its factorization.

123204655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48306.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 123204655 is about 11099.7592316230. The cubic root of 123204655 is about 497.5946538418.

Adding to 123204655 its reverse (556402321), we get a palindrome (679606976).

The spelling of 123204655 in words is "one hundred twenty-three million, two hundred four thousand, six hundred fifty-five".