123200656 has 20 divisors (see below), whose sum is σ = 240935472. Its totient is φ = 61023776.

The previous prime is 123200647. The next prime is 123200657. The reversal of 123200656 is 656002321.

It is a self number, because there is not a number n which added to its sum of digits gives 123200656.

It is not an unprimeable number, because it can be changed into a prime (123200657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34270 + ... + 37693.

Almost surely, 2^123200656 is an apocalyptic number.

123200656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123200656 is a deficient number, since it is larger than the sum of its proper divisors (117734816).

123200656 is a wasteful number, since it uses less digits than its factorization.

123200656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72078 (or 72072 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 123200656 is about 11099.5790911187. The cubic root of 123200656 is about 497.5892701098.

Adding to 123200656 its reverse (656002321), we get a palindrome (779202977).

The spelling of 123200656 in words is "one hundred twenty-three million, two hundred thousand, six hundred fifty-six".