122503656 has 64 divisors (see below), whose sum is σ = 345643200. Its totient is φ = 35840000.

The previous prime is 122503651. The next prime is 122503657. The reversal of 122503656 is 656305221.

It is a Smith number, since the sum of its digits (30) 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 (122503651) 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 15 ways as a sum of consecutive naturals, for example, 345 + ... + 15656.

It is an arithmetic number, because the mean of its divisors is an integer number (5400675).

Almost surely, 2^122503656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122503656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172821600).

122503656 is an abundant number, since it is smaller than the sum of its proper divisors (223139544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122503656 is a wasteful number, since it uses less digits than its factorization.

122503656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16050 (or 16046 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 122503656 is about 11068.1369706017. The cubic root of 122503656 is about 496.6491349056.

Adding to 122503656 its reverse (656305221), we get a palindrome (778808877).

The spelling of 122503656 in words is "one hundred twenty-two million, five hundred three thousand, six hundred fifty-six".