123345556 has 6 divisors (see below), whose sum is σ = 215854730. Its totient is φ = 61672776.

The previous prime is 123345529. The next prime is 123345571. The reversal of 123345556 is 655543321.

It can be written as a sum of positive squares in only one way, i.e., 118461456 + 4884100 = 10884^2 + 2210^2 .

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 15418191 + ... + 15418198.

Almost surely, 2^123345556 is an apocalyptic number.

It is an amenable number.

123345556 is a deficient number, since it is larger than the sum of its proper divisors (92509174).

123345556 is a wasteful number, since it uses less digits than its factorization.

123345556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30836393 (or 30836391 counting only the distinct ones).

The product of its digits is 54000, while the sum is 34.

The square root of 123345556 is about 11106.1044475550. The cubic root of 123345556 is about 497.7842702541.

Adding to 123345556 its reverse (655543321), we get a palindrome (778888877).

The spelling of 123345556 in words is "one hundred twenty-three million, three hundred forty-five thousand, five hundred fifty-six".